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.

A263747 Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and every three consecutive elements having its maximum within 5 of its minimum.

Table of values

n a(n)
1 1
2 2
3 6
4 24
5 78
6 230
7 506
8 1128
9 2641
10 6655
11 17261
12 46066
13 119052
14 300864
15 750728
16 1876024
17 4711588
18 11951068
19 30392680
20 77225565
21 195701321
22 494881594
23 1249924470
24 3159185418
25 7992133318
26 20232067074
27 51226594151
28 129680774266

List of values

[1, 2, 6, 24, 78, 230, 506, 1128, 2641, 6655, 17261, 46066, 119052, 300864, 750728, 1876024, 4711588, 11951068, 30392680, 77225565, 195701321, 494881594, 1249924470, 3159185418, 7992133318, 20232067074, 51226594151, 129680774266]

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

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