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.

A240518 Number of nX7 0..1 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..1 introduced in row major order.

Table of values

n a(n)
1 21
2 86
3 515
4 3765
5 28942
6 231665
7 1906245
8 16000486
9 135790448
10 1158315893
11 9946076742
12 85823282205
13 743139183617
14 6451236349918
15 56119492560507
16 488978060398481
17 4265874977466648
18 37250999894755072
19 325525391487428809

List of values

[21, 86, 515, 3765, 28942, 231665, 1906245, 16000486, 135790448, 1158315893, 9946076742, 85823282205, 743139183617, 6451236349918, 56119492560507, 488978060398481, 4265874977466648, 37250999894755072, 325525391487428809]

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

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