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.

A181223 Number of nX7 binary matrices with no three 1's adjacent in a line horizontally, vertically, diagonally or antidiagonally.

Table of values

n a(n)
1 81
2 6561
3 179097
4 7426986
5 316896477
6 12297765846
7 493466099722
8 19886730240632
9 794878208506289
10 31852650059853831
11 1277093175893680596
12 51166967011661264756
13 2050407503529684003122
14 82170493913101130433607

List of values

[81, 6561, 179097, 7426986, 316896477, 12297765846, 493466099722, 19886730240632, 794878208506289, 31852650059853831, 1277093175893680596, 51166967011661264756, 2050407503529684003122, 82170493913101130433607]

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

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