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.

A198711 Number of n X 4 0..3 arrays with values 0..3 introduced in row major order and no element equal to any horizontal or vertical neighbor.

Table of values

n a(n)
1 5
2 172
3 6548
4 250031
5 9548295
6 364637102
7 13925032958
8 531779578441
9 20307996787865
10 775536991678112
11 29616787512285048
12 1131028064429979731
13 43192546862380323515
14 1649469330720040937602
15 62991170251091380482818

List of values

[5, 172, 6548, 250031, 9548295, 364637102, 13925032958, 531779578441, 20307996787865, 775536991678112, 29616787512285048, 1131028064429979731, 43192546862380323515, 1649469330720040937602, 62991170251091380482818]

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

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