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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
OFFSET
0,2
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 A355730
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Oct 28 2007
STATUS
approved