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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.

A346198 a(n) is the number of permutations on [n] with no strong fixed points but contains at least one small descent.

Table of values

n a(n)
1 0
2 1
3 1
4 8
5 43
6 283
7 2126
8 17947
9 168461
10 1741824
11 19684171
12 241506539
13 3198239994
14 45482655683
15 691471698917
16 11193266251700
17 192238116358427
18 3491633681792507
19 66875708261486766
20 1347168876070616179
21 28474546456352896021
22 630130731702950549248
23 14570725407559756078387
24 351411668456841530417027

List of values

[0, 1, 1, 8, 43, 283, 2126, 17947, 168461, 1741824, 19684171, 241506539, 3198239994, 45482655683, 691471698917, 11193266251700, 192238116358427, 3491633681792507, 66875708261486766, 1347168876070616179, 28474546456352896021, 630130731702950549248, 14570725407559756078387, 351411668456841530417027]

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

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