cp's OEIS Frontend

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.

A325929 Total number of sub-subsets of set partitions of [n] where each subset is again partitioned into nonempty subsets.

Table of values

n a(n)
0 0
1 1
2 4
3 14
4 57
5 262
6 1326
7 7499
8 47662
9 334794
10 2555639
11 21124116
12 189492474
13 1838561337
14 19094196270
15 210014919406
16 2433655645025
17 29707254349866
18 382324345380310
19 5179102279125987
20 73515985821539778
21 1087888385861343158
22 16724494503770495231

List of values

[0, 1, 4, 14, 57, 262, 1326, 7499, 47662, 334794, 2555639, 21124116, 189492474, 1838561337, 19094196270, 210014919406, 2433655645025, 29707254349866, 382324345380310, 5179102279125987, 73515985821539778, 1087888385861343158, 16724494503770495231]

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

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