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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.

A317128 Number of permutations of [n] whose lengths of increasing runs are Fibonacci numbers.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 23
5 112
6 652
7 4425
8 34358
9 299971
10 2910304
11 31059715
12 361603228
13 4560742758
14 61947243329
15 901511878198
16 13994262184718
17 230811430415207
18 4030772161073249
19 74301962970014978
20 1441745847111969415
21 29374226224980834077
22 626971133730275593916

List of values

[1, 1, 2, 6, 23, 112, 652, 4425, 34358, 299971, 2910304, 31059715, 361603228, 4560742758, 61947243329, 901511878198, 13994262184718, 230811430415207, 4030772161073249, 74301962970014978, 1441745847111969415, 29374226224980834077, 626971133730275593916]

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

Content is available under The OEIS End-User License Agreement.