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.

A006957 Self-convolution of numbers of preferential arrangements.

Table of values

n a(n)
0 1
1 2
2 7
3 32
4 185
5 1310
6 11067
7 109148
8 1234045
9 15752858
10 224169407
11 3518636504
12 60381131265
13 1124390692886
14 22577494959427
15 486212633129300
16 11177317486573445
17 273173247028616594
18 7072436847620016327
19 193351544314753174736
20 5565941751233499986185

List of values

[1, 2, 7, 32, 185, 1310, 11067, 109148, 1234045, 15752858, 224169407, 3518636504, 60381131265, 1124390692886, 22577494959427, 486212633129300, 11177317486573445, 273173247028616594, 7072436847620016327, 193351544314753174736, 5565941751233499986185]

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

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