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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.

A346189 a(n) is the number of permutations on [n] with no strong fixed points or small descents.

Table of values

n a(n)
1 0
2 0
3 2
4 6
5 34
6 214
7 1550
8 12730
9 116874
10 1187022
11 13219550
12 160233258
13 2100360778
14 29610224590
15 446789311934
16 7185155686666
17 122690711149290
18 2217055354281582
19 42269657477711198
20 847998698508705834
21 17857221256001240458
22 393839277313540073230
23 9078806210245773668990
24 218340709713567352161226

List of values

[0, 0, 2, 6, 34, 214, 1550, 12730, 116874, 1187022, 13219550, 160233258, 2100360778, 29610224590, 446789311934, 7185155686666, 122690711149290, 2217055354281582, 42269657477711198, 847998698508705834, 17857221256001240458, 393839277313540073230, 9078806210245773668990, 218340709713567352161226]

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

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