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.

A264572 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 1,0 1,1 0,-1 or -1,1.

Table of values

n a(n)
1 2
2 8
3 31
4 192
5 1130
6 8356
7 47571
8 305844
9 1871556
10 11815440
11 73467099
12 457338532
13 2850911356
14 17771612880
15 110773680091
16 690026338272
17 4300552632388
18 26800830750202
19 167010622956533
20 1040699613256184
21 6485315542593720

List of values

[2, 8, 31, 192, 1130, 8356, 47571, 305844, 1871556, 11815440, 73467099, 457338532, 2850911356, 17771612880, 110773680091, 690026338272, 4300552632388, 26800830750202, 167010622956533, 1040699613256184, 6485315542593720]

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

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