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.

A189906 Number of 4Xn binary arrays without the pattern 0 0 1 1 diagonally, vertically, antidiagonally or horizontally.

Table of values

n a(n)
1 15
2 225
3 3375
4 35656
5 372850
6 3833322
7 39048081
8 395408137
9 3984364191
10 40031462211
11 401659633507
12 4025118368372
13 40315220042932
14 403641830599161
15 4040392891662855
16 40438586707202572
17 404700496922543129

List of values

[15, 225, 3375, 35656, 372850, 3833322, 39048081, 395408137, 3984364191, 40031462211, 401659633507, 4025118368372, 40315220042932, 403641830599161, 4040392891662855, 40438586707202572, 404700496922543129]

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

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