%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, 1n*x^k+x*O(x^n)), n)}
%Y Cf. A124577, A291698, A292131.
%K sign
%O 0,3
%A _Seiichi Manyama_, Sep 09 2017
