A292132 Main diagonal of A292131.
1, -1, -2, 6, 12, 45, -150, -203, -840, -1872, 6390, 8580, 30084, 69108, 165802, -494565, -514320, -1997296, -4202298, -10175526, -18908420, 49930440, 54032770, 190735688, 405256872, 948210600, 1751280726, 3624555168, -7676955468, -6724059944, -26741354430
Offset: 0
Keywords
Links
- Seiichi Manyama, Table of n, a(n) for n = 0..1000
Programs
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PARI
{a(n) = polcoeff(prod(k=1, n, 1-n*x^k+x*O(x^n)), n)}
Formula
a(n) = [x^n] Product_{k=1..n} (1 - n*x^k).