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A117255 Column 0 of triangle A117254. 1
1, 1, -6, 224, -39424, 30277632, -98180268032, 1321338098679808, -73064711504598663168, 16493270769791857518968832, -15132641904367108441083979235328, 56258298143912014448000446346897129472, -845539117695226477286180063077230730209656832 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
FORMULA
a(n) = [prod_{j=0..n-1} (1-4*j)]/n! * 4^(n*(n-1)/2).
PROG
(PARI) {a(n)=local(m=1, p=4, q=4, r=1); prod(j=0, n-1, m*r-p*j)/n!*q^(n*(n-1)/2)}
CROSSREFS
Sequence in context: A355669 A061610 A054324 * A130644 A223100 A233142
KEYWORD
sign
AUTHOR
Paul D. Hanna, Mar 14 2006
STATUS
approved

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Last modified April 13 03:15 EDT 2024. Contains 371639 sequences. (Running on oeis4.)