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 A135748 a(n) = Sum_{k=0..n} binomial(n,k)*2^(k^2). 3
 1, 3, 21, 567, 67689, 33887403, 68921796861, 563431696713567, 18451249599365935569, 2418017680197896730749523, 1267674779574792745831097365221, 2658469935859419140387217204140789127, 22300777100086187451068223319189800258419769 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS G. C. Greubel, Table of n, a(n) for n = 0..50 FORMULA a(n) ~ 2^(n^2). - Vaclav Kotesovec, Nov 27 2017 MATHEMATICA Table[Sum[Binomial[n, k]2^k^2, {k, 0, n}], {n, 0, 15}] (* Harvey P. Dale, May 30 2013 *) PROG (PARI) {a(n)=sum(k=0, n, binomial(n, k)*2^(k^2))} CROSSREFS Sequence in context: A032469 A006927 A014375 * A145386 A135327 A128679 Adjacent sequences:  A135745 A135746 A135747 * A135749 A135750 A135751 KEYWORD nonn AUTHOR Paul D. Hanna, Nov 27 2007 STATUS approved

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Last modified January 17 03:58 EST 2018. Contains 297774 sequences.