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A069865 Sum of C(n,k)^6. +0
1
1, 2, 66, 1460, 54850, 2031252, 86874564, 3848298792, 180295263810, 8709958973540, 433617084579316, 22071658807720392, 1145600816547477316, 60423221241495866600, 3231675487858598367240, 174928470621208572186960 (list; graph; listen)
OFFSET

0,2

REFERENCES

C. Elsner, On recurrence formulae for sums involving binomial coefficients, Fib. Q., 43 (No. 1, 2005), 31-45.

FORMULA

a(n) ~ 4*3^(-1/2)*pi^(-5/2)*n^(-5/2)*2^(6*n)

CROSSREFS

Cf. A005261.

Adjacent sequences: A069862 A069863 A069864 this_sequence A069866 A069867 A069868

Sequence in context: A075809 A131472 A098532 this_sequence A092884 A119552 A016535

KEYWORD

nonn

AUTHOR

Joe Keane (jgk(AT)jgk.org), Jun 21 2002

page 1

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.


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