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Search: id:A035489
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| A035489 |
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Main column of the Stolarsky array. |
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+0
2
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| 1, 6, 18, 39, 81, 157, 309, 576, 1042, 1885, 3338, 6011, 10569, 18321, 31851, 55717, 95320, 163580, 278208, 478807, 814329, 1374926, 2328359, 3963782, 6656320, 11209356, 18772741, 31524784, 53186481, 88750072, 148471480, 247281057
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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General solution for the Stolarsky array by row, column is given by the GP-PARI program. Solution for the main diagonal in A035489 is found by setting r=c. If computing large terms for the Stolarsky array, increase the default precision of GP-PARI to accommodate the size. - Randall L. Rathbun (randallr(AT)abac.com), Jan 25 2002
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LINKS
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N. J. A. Sloane, Classic Sequences
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PROGRAM
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(PARI) {Stolarsky(r, c)= tau=(1+sqrt(5))/2; a=floor(r*(1+tau)-tau/2); b=round(a*tau); if(c==1, a, if(c==2, b, for(i=1, c-2, d=a+b; a=b; b=d; ); d))}
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CROSSREFS
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See A007064 for references.
Sequence in context: A132432 A005899 A129863 this_sequence A122061 A002411 A023658
Adjacent sequences: A035486 A035487 A035488 this_sequence A035490 A035491 A035492
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from Randall L. Rathbun (randallr(AT)abac.com), Jan 25 2002
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