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.

A219145 Unchanging value maps: number of 4Xn binary arrays indicating the locations of corresponding elements unequal to no horizontal, diagonal or antidiagonal neighbor in a random 0..2 4Xn array.

Table of values

n a(n)
1 1
2 51
3 331
4 1774
5 10505
6 59127
7 341648
8 1963817
9 11341895
10 65406069
11 377314947
12 2175983774
13 12550566460
14 72389111386
15 417539600863
16 2408347532016
17 13891206637891

List of values

[1, 51, 331, 1774, 10505, 59127, 341648, 1963817, 11341895, 65406069, 377314947, 2175983774, 12550566460, 72389111386, 417539600863, 2408347532016, 13891206637891]

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

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