A332303 a(n) = (n^2)! * [x^(n^2)] 1 / (1 - Sum_{k>=1} x^(n*k) / (n*k)!).

1, 1, 7, 1849, 65782211, 633287284180541, 2684646142383590108047885, 7376495464848567792567195041277565905, 18175605935440100610889032969797881598437325871194971, 53139431374789917342401028242879020609739813068021830228099307511801461

Offset

0,3

Links

Table of n, a(n) for n=0..9.

Mathematica

Table[(n^2)! SeriesCoefficient[1/(1 - Sum[x^(n k)/(n k)!, {k, 1, n}]), {x, 0, n^2}], {n, 0, 9}]

Crossrefs

Main diagonal of A260883.

Cf. A000670, A326996.

Sequence in context: A206459 A172937 A185407 * A145253 A248730 A024099

Adjacent sequences: A332300 A332301 A332302 * A332304 A332305 A332306

Keyword

nonn

Author

Ilya Gutkovskiy, Feb 09 2020

Status

approved