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A134485 Row sums of triangle A134484(n,k) = 2^[n(n-1) - k(k-1)] * C(n,k). 1
1, 2, 13, 305, 26881, 9078017, 11882207233, 60716967030785, 1217207202583019521, 96068905115897742032897, 29929069804525281689001787393, 36877162272858587692985585499111425 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

PROG

(PARI) a(n)=sum(k=0, n, 2^(n*(n-1) - k*(k-1))*binomial(n, k))

CROSSREFS

Cf. A134484.

Sequence in context: A011808 A011841 A013106 * A236551 A304727 A075620

Adjacent sequences:  A134482 A134483 A134484 * A134486 A134487 A134488

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Oct 28 2007

STATUS

approved

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Last modified September 16 18:43 EDT 2019. Contains 327117 sequences. (Running on oeis4.)