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.

A264478 Number of (4+1) X (n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 0,1 1,0 2,1 or -1,-1.

Table of values

n a(n)
1 1
2 8
3 16
4 120
5 456
6 2272
7 11044
8 49200
9 236196
10 1113296
11 5157772
12 24352896
13 114256032
14 534574312
15 2511482164
16 11778946872
17 55224573264
18 259130295272
19 1215413555584
20 5700599522328
21 26741489475588
22 125432405841016

List of values

[1, 8, 16, 120, 456, 2272, 11044, 49200, 236196, 1113296, 5157772, 24352896, 114256032, 534574312, 2511482164, 11778946872, 55224573264, 259130295272, 1215413555584, 5700599522328, 26741489475588, 125432405841016]

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

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