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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.

A320502 a(n) = Sum_{k=0..n} (k!)^2 * abs(Stirling1(n,k)).

Table of values

n a(n)
0 1
1 1
2 5
3 50
4 842
5 21644
6 792676
7 39297600
8 2536525008
9 206794669104
10 20785423425264
11 2525457805492896
12 364910211591903072
13 61847041340997089280
14 12151693924459271926272
15 2739901558132307387349504
16 702704348810821821056454144
17 203409730893592265642619623424

List of values

[1, 1, 5, 50, 842, 21644, 792676, 39297600, 2536525008, 206794669104, 20785423425264, 2525457805492896, 364910211591903072, 61847041340997089280, 12151693924459271926272, 2739901558132307387349504, 702704348810821821056454144, 203409730893592265642619623424]

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

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