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.

A263639 Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and with no two consecutive increases.

Table of values

n a(n)
1 1
2 2
3 5
4 17
5 70
6 226
7 538
8 1417
9 3734
10 10564
11 29274
12 81109
13 219924
14 603970
15 1654203
16 4552899
17 12482279
18 34293113
19 93987924
20 258097242
21 707931841
22 1943681720
23 5332252281
24 14636363836
25 40158264369
26 110218824475
27 302439248237

List of values

[1, 2, 5, 17, 70, 226, 538, 1417, 3734, 10564, 29274, 81109, 219924, 603970, 1654203, 4552899, 12482279, 34293113, 93987924, 258097242, 707931841, 1943681720, 5332252281, 14636363836, 40158264369, 110218824475, 302439248237]

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

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