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Search: id:A134238
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| 1, 5, 14, 28, 47, 71, 100, 134, 173, 217, 266, 320, 379, 443, 512, 586, 665, 749, 838, 932, 1031, 1135, 1244, 1358, 1477, 1601, 1730, 1864, 2003, 2147, 2296, 2450, 2609, 2773, 2942, 3116, 3295, 3479, 3668, 3862, 4061, 4265, 4474, 4688, 4907, 5131
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OFFSET
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1,2
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FORMULA
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Binomial transform of (1, 4, 5, 0, 0, 0,...).
a(n)=5*n+a(n-1)-6 (with a(1)=1) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 09 2009]
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EXAMPLE
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a(4) = 28 = sum of row 4 terms of triangle A134237: (7 + 8 + 9 + 4).
a(4) = 28 = (1, 3, 3, 1) dot (1, 4, 5, 0) = (1 + 12 + 15 + 0).
For n=2, a(2)=5*2+1-6=5; n=3, a(3)=5*3+5-6=14; n=4, a(4)=5*4+14-6=28 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 09 2009]
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CROSSREFS
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Cf. A134237.
Sequence in context: A140342 A055454 A073347 this_sequence A024800 A005586 A031333
Adjacent sequences: A134235 A134236 A134237 this_sequence A134239 A134240 A134241
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KEYWORD
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nonn,new
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Oct 14 2007
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EXTENSIONS
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More terms a(11)-a(46) Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 09 2009
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