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.

A264545 Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change -1,1 -1,2 1,0 or 0,-1.

Table of values

n a(n)
1 1
2 6
3 16
4 45
5 133
6 400
7 1204
8 3561
9 10554
10 31493
11 93784
12 278862
13 829809
14 2469737
15 7349616
16 21870896
17 65083321
18 193678264
19 576359005
20 1715146434
21 5103989104
22 15188659597
23 45198999981
24 134504868528
25 400264674436
26 1191122820729

List of values

[1, 6, 16, 45, 133, 400, 1204, 3561, 10554, 31493, 93784, 278862, 829809, 2469737, 7349616, 21870896, 65083321, 193678264, 576359005, 1715146434, 5103989104, 15188659597, 45198999981, 134504868528, 400264674436, 1191122820729]

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

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