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.

A264672 Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change -1,-1 1,0 -1,-2 -2,-2 or 0,1.

Table of values

n a(n)
1 1
2 29
3 123
4 890
5 6851
6 43131
7 291315
8 1980287
9 13199209
10 88670692
11 595721002
12 3995710025
13 26820625288
14 180019819900
15 1208161823995
16 8108780202591
17 54422802858380
18 365262503014440
19 2451492555516290
20 16453389631984472

List of values

[1, 29, 123, 890, 6851, 43131, 291315, 1980287, 13199209, 88670692, 595721002, 3995710025, 26820625288, 180019819900, 1208161823995, 8108780202591, 54422802858380, 365262503014440, 2451492555516290, 16453389631984472]

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

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