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.

A137482 Number of permutations of n objects such that no two-element subset is preserved.

Table of values

n a(n)
0 1
1 1
2 0
3 2
4 14
5 54
6 304
7 2260
8 18108
9 161756
10 1618496
11 17815896
12 213767080
13 2778833992
14 38904145344
15 583563781424
16 9337011390224
17 158729175524880
18 2857125341582848
19 54285381652008736
20 1085707629235539936
21 22799860214350346336
22 501596924799005576960

List of values

[1, 1, 0, 2, 14, 54, 304, 2260, 18108, 161756, 1618496, 17815896, 213767080, 2778833992, 38904145344, 583563781424, 9337011390224, 158729175524880, 2857125341582848, 54285381652008736, 1085707629235539936, 22799860214350346336, 501596924799005576960]

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

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