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.

A326248 Number of crossing, nesting set partitions of {1..n}.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 2
6 28
7 252
8 1890
9 13020
10 86564
11 571944
12 3826230
13 26233662
14 185746860
15 1364083084
16 10410773076
17 82609104802
18 681130756224
19 5829231836494
20 51711093240518
21 474821049202852
22 4506533206814480
23 44151320870760216
24 445956292457725714

List of values

[0, 0, 0, 0, 0, 2, 28, 252, 1890, 13020, 86564, 571944, 3826230, 26233662, 185746860, 1364083084, 10410773076, 82609104802, 681130756224, 5829231836494, 51711093240518, 474821049202852, 4506533206814480, 44151320870760216, 445956292457725714]

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

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