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.

A297678 Number of nX4 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 4 neighboring 1s.

Table of values

n a(n)
1 13
2 80
3 629
4 4633
5 34872
6 260924
7 1955750
8 14651847
9 109783269
10 822547725
11 6162992737
12 46176452589
13 345979170190
14 2592263829464
15 19422650189445
16 145525052534819
17 1090352803546358
18 8169515919608631
19 61210454258421286

List of values

[13, 80, 629, 4633, 34872, 260924, 1955750, 14651847, 109783269, 822547725, 6162992737, 46176452589, 345979170190, 2592263829464, 19422650189445, 145525052534819, 1090352803546358, 8169515919608631, 61210454258421286]

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

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