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A152801
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a(n) = A152800(n+1,2n) for n>=0.
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2
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1, 2, 5, 21, 87, 378, 1682, 7596, 34688, 159724, 740243, 3448579, 16134813, 75760294, 356811308, 1684882778, 7974184903, 37815280813, 179644013528, 854749753320, 4072634928710, 19429522879905, 92799859650401
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Triangle A152800 gives a q-analog of the Euler numbers.
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PROG
| (PARI) {a(n)=polcoeff(polcoeff(1/sum(m=0, n+1, (-1)^m*x^(2*m)/prod(j=1, 2*m, (q^j-1)/(q-1))+x*O(x^(2*n+2))), 2*n+2, x)*prod(j=1, 2*n+2, (q^j-1)/(q-1)), 2*n, q)}
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CROSSREFS
| Cf. A152800; A152802.
Sequence in context: A039777 A000941 A000131 * A062297 A047104 A115087
Adjacent sequences: A152798 A152799 A152800 * A152802 A152803 A152804
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KEYWORD
| nonn
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AUTHOR
| Paul D. Hanna (pauldhanna(AT)juno.com), Dec 26 2008
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