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.

A263641 Number of length n arrays of permutations of 0..n-1 with each element moved by -6 to 6 places and with no two consecutive increases.

Table of values

n a(n)
1 1
2 2
3 5
4 17
5 70
6 349
7 2017
8 9673
9 36321
10 138420
11 511748
12 1952716
13 7596839
14 30518737
15 122761971
16 492354214
17 1954807815
18 7749597167
19 30587342598
20 120939248751
21 478688493595
22 1897205025687
23 7520593309740
24 29825363773570
25 118218233684104

List of values

[1, 2, 5, 17, 70, 349, 2017, 9673, 36321, 138420, 511748, 1952716, 7596839, 30518737, 122761971, 492354214, 1954807815, 7749597167, 30587342598, 120939248751, 478688493595, 1897205025687, 7520593309740, 29825363773570, 118218233684104]

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

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