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Search: id:A027568
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| A027568 |
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Numbers that are both triangular and tetrahedral. |
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+0
5
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OFFSET
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1,3
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REFERENCES
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Avanesov, E. T.; Solution of a problem on figurate numbers. (Russian) Acta Arith. 12 1966/1967 409-420.
J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 10, p. 3 ; Entry 119, p. 41, Ellipses, Paris 2008.
L. J. Mordell, Diophantine Equations, Ac. Press, p. 258.
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LINKS
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P. De Geest, Palindromic Tetrahedrals
Eric Weisstein's World of Mathematics, More information
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MAPLE
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{seq(binomial(i, 3), i=0..100000) } intersect {seq(binomial(k, 2), k= 0..100000)}; - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 26 2008
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CROSSREFS
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Intersection of A000217 and A000292. Cf. A102349, A102461, A102772.
Sequence in context: A069498 A024127 A005949 this_sequence A034255 A051582 A122420
Adjacent sequences: A027565 A027566 A027567 this_sequence A027569 A027570 A027571
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KEYWORD
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nonn,fini,full
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com)
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