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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.

A308037 a(n) = Sum_{d|n} Stirling2(n,d).

Table of values

n a(n)
1 1
2 2
3 2
4 9
5 2
6 123
7 2
8 1830
9 3027
10 43038
11 2
12 2023728
13 2
14 49337473
15 213142023
16 2313595723
17 2
18 216927216877
19 2
20 6712023695345
21 82312699558575
22 366282502967439
23 2
24 113350450913387211
25 2436684974110753
26 1850568574287104493
27 106563274551407600878
28 231678790379913209098
29 2

List of values

[1, 2, 2, 9, 2, 123, 2, 1830, 3027, 43038, 2, 2023728, 2, 49337473, 213142023, 2313595723, 2, 216927216877, 2, 6712023695345, 82312699558575, 366282502967439, 2, 113350450913387211, 2436684974110753, 1850568574287104493, 106563274551407600878, 231678790379913209098, 2]

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

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