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.

A268991 Number of n X 4 binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two not more than once.

Table of values

n a(n)
1 13
2 103
3 805
4 6009
5 43512
6 308112
7 2144780
8 14730784
9 100087792
10 674045392
11 4505925696
12 29933341056
13 197782652096
14 1300744853760
15 8519586895104
16 55600022810880
17 361688403251200
18 2346083095244800
19 15178387509332992

List of values

[13, 103, 805, 6009, 43512, 308112, 2144780, 14730784, 100087792, 674045392, 4505925696, 29933341056, 197782652096, 1300744853760, 8519586895104, 55600022810880, 361688403251200, 2346083095244800, 15178387509332992]

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

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