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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.

A005493 2-Bell numbers: a(n) = number of partitions of [n+1] with a distinguished block.

Table of values

n a(n)
0 1
1 3
2 10
3 37
4 151
5 674
6 3263
7 17007
8 94828
9 562595
10 3535027
11 23430840
12 163254885
13 1192059223
14 9097183602
15 72384727657
16 599211936355
17 5150665398898
18 45891416030315
19 423145657921379
20 4031845922290572
21 39645290116637023
22 401806863439720943
23 4192631462935194064

List of values

[1, 3, 10, 37, 151, 674, 3263, 17007, 94828, 562595, 3535027, 23430840, 163254885, 1192059223, 9097183602, 72384727657, 599211936355, 5150665398898, 45891416030315, 423145657921379, 4031845922290572, 39645290116637023, 401806863439720943, 4192631462935194064]

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

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