OFFSET
0,2
COMMENTS
Triangle A152800 gives a q-analog of the Euler numbers.
LINKS
M. M. Graev, Einstein equations for invariant metrics on flag spaces and their Newton polytopes, Transactions of the Moscow Mathematical Society, 2014, pp. 13-68. Original publication: Trudy Moskovskogo Matematicheskogo Obshchestva, tom 75 (2014), vypusk 1.
PROG
(PARI) {a(n)=polcoeff(polcoeff(1/sum(m=0, n+2, (-1)^m*x^(2*m)/prod(j=1, 2*m, (q^j-1)/(q-1))+x*O(x^(2*n+4))), 2*n+4, x)*prod(j=1, 2*n+4, (q^j-1)/(q-1)), 2*n+1, q)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 26 2008
STATUS
approved