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.

A264381 Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1.

Table of values

n a(n)
1 1
2 13
3 80
4 385
5 2345
6 14329
7 88264
8 538417
9 3284212
10 20034334
11 122324128
12 746763789
13 4557854384
14 27820780958
15 169811407936
16 1036520322168
17 6326740063001
18 38617694163183
19 235716525841304
20 1438783215929873

List of values

[1, 13, 80, 385, 2345, 14329, 88264, 538417, 3284212, 20034334, 122324128, 746763789, 4557854384, 27820780958, 169811407936, 1036520322168, 6326740063001, 38617694163183, 235716525841304, 1438783215929873]

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

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