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.

A263698 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 4 of its minimum.

Table of values

n a(n)
1 1
2 2
3 6
4 24
5 78
6 110
7 169
8 301
9 616
10 1373
11 2908
12 5908
13 11544
14 22644
15 45460
16 91977
17 186645
18 376625
19 756105
20 1518054
21 3049762
22 6137766
23 12359571
24 24876504
25 50054780
26 100682624
27 202531226
28 407477585
29 819858684
30 1649639041
31 3319062167

List of values

[1, 2, 6, 24, 78, 110, 169, 301, 616, 1373, 2908, 5908, 11544, 22644, 45460, 91977, 186645, 376625, 756105, 1518054, 3049762, 6137766, 12359571, 24876504, 50054780, 100682624, 202531226, 407477585, 819858684, 1649639041, 3319062167]

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

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