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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A356689 a(n) = n! * Sum_{k=0..n} k^(k*n)/k!.

Table of values

n a(n)
0 1
1 2
2 20
3 19887
4 4297096180
5 298028721722131825
6 10314430386434427534836297166
7 256923580889667624113335512704714686054849
8 6277101737079381675512518990977258744796239498871290255000

List of values

[1, 2, 20, 19887, 4297096180, 298028721722131825, 10314430386434427534836297166, 256923580889667624113335512704714686054849, 6277101737079381675512518990977258744796239498871290255000]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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