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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.

A263422 Number of nX4 arrays of permutations of 0..n*4-1 with each element moved a city block distance of 0 or 2.

Table of values

n a(n)
1 4
2 196
3 26244
4 1993744
5 141086884
6 10808097444
7 831331827076
8 63322713408249
9 4821670840815504
10 367536797553489424
11 28019444925515784976
12 2135875239154027938961
13 162806957002649300388100

List of values

[4, 196, 26244, 1993744, 141086884, 10808097444, 831331827076, 63322713408249, 4821670840815504, 367536797553489424, 28019444925515784976, 2135875239154027938961, 162806957002649300388100]

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

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