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A292132 Main diagonal of A292131. 4

%I

%S 1,-1,-2,6,12,45,-150,-203,-840,-1872,6390,8580,30084,69108,165802,

%T -494565,-514320,-1997296,-4202298,-10175526,-18908420,49930440,

%U 54032770,190735688,405256872,948210600,1751280726,3624555168,-7676955468,-6724059944,-26741354430

%N Main diagonal of A292131.

%H Seiichi Manyama, <a href="/A292132/b292132.txt">Table of n, a(n) for n = 0..1000</a>

%F a(n) = [x^n] Product_{k=1..n} (1 - n*x^k).

%o (PARI) {a(n) = polcoeff(prod(k=1, n, 1-n*x^k+x*O(x^n)), n)}

%Y Cf. A124577, A291698, A292131.

%K sign

%O 0,3

%A _Seiichi Manyama_, Sep 09 2017

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Last modified February 25 08:33 EST 2021. Contains 341606 sequences. (Running on oeis4.)