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.

A036240 Number of 3-way interactions when 3 subsets of power set on {1..n} are chosen at random; number of Boolean functions of n variables and rank 3 from Post class F(8,inf).

Table of values

n a(n)
1 0
2 0
3 12
4 200
5 2280
6 22420
7 205212
8 1806000
9 15522960
10 131383340
11 1100093412
12 9138243400
13 75445046040
14 619838752260
15 5072272077612
16 41371548418400
17 336519691295520
18 2730963319321180
19 22119245290765812
20 178854325039467000
21 1444135501669535400

List of values

[0, 0, 12, 200, 2280, 22420, 205212, 1806000, 15522960, 131383340, 1100093412, 9138243400, 75445046040, 619838752260, 5072272077612, 41371548418400, 336519691295520, 2730963319321180, 22119245290765812, 178854325039467000, 1444135501669535400]

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

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