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.

A263637 Number of length n arrays of permutations of 0..n-1 with each element moved by -2 to 2 places and with no two consecutive increases.

Table of values

n a(n)
1 1
2 2
3 5
4 9
5 11
6 19
7 27
8 44
9 65
10 104
11 155
12 246
13 370
14 582
15 882
16 1379
17 2100
18 3270
19 4997
20 7758
21 11885
22 18413
23 28258
24 43714
25 67171
26 103801
27 159643
28 246515
29 379373
30 585502
31 901460
32 1390734
33 2141907
34 3303555
35 5089046
36 7847557
37 12090913
38 18642253
39 28725828

List of values

[1, 2, 5, 9, 11, 19, 27, 44, 65, 104, 155, 246, 370, 582, 882, 1379, 2100, 3270, 4997, 7758, 11885, 18413, 28258, 43714, 67171, 103801, 159643, 246515, 379373, 585502, 901460, 1390734, 2141907, 3303555, 5089046, 7847557, 12090913, 18642253, 28725828]

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

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