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.

A240625 Number of nX2 0..3 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..3 introduced in row major order.

Table of values

n a(n)
1 2
2 10
3 109
4 1332
5 16624
6 208015
7 2604059
8 32601488
9 408158709
10 5110007540
11 63975568178
12 800952543871
13 10027655890879
14 125542872147582
15 1571754448134085
16 19677835970041564
17 246359874423207164

List of values

[2, 10, 109, 1332, 16624, 208015, 2604059, 32601488, 408158709, 5110007540, 63975568178, 800952543871, 10027655890879, 125542872147582, 1571754448134085, 19677835970041564, 246359874423207164]

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

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