login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A135748 a(n) = Sum_{k=0..n} C(n,k)*2^(k^2). 2
1, 3, 21, 567, 67689, 33887403, 68921796861, 563431696713567, 18451249599365935569, 2418017680197896730749523, 1267674779574792745831097365221, 2658469935859419140387217204140789127 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..11.

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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified November 22 22:27 EST 2014. Contains 249835 sequences.