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.

A263759 Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and exactly one more element moved upwards than downwards.

Table of values

n a(n)
1 0
2 0
3 1
4 4
5 19
6 50
7 165
8 476
9 1543
10 4544
11 14108
12 41666
13 127313
14 379674
15 1152233
16 3448844
17 10424890
18 31290646
19 94453041
20 284071264
21 857114281
22 2581411140
23 7789677889
24 23486717204
25 70901078303
26 213968862304
27 646246694302

List of values

[0, 0, 1, 4, 19, 50, 165, 476, 1543, 4544, 14108, 41666, 127313, 379674, 1152233, 3448844, 10424890, 31290646, 94453041, 284071264, 857114281, 2581411140, 7789677889, 23486717204, 70901078303, 213968862304, 646246694302]

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

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