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.

A219138 Unchanging value maps: number of nX4 binary arrays indicating the locations of corresponding elements unequal to no horizontal, diagonal or antidiagonal neighbor in a random 0..2 nX4 array.

Table of values

n a(n)
1 7
2 39
3 281
4 1774
5 11385
6 73136
7 472638
8 3050285
9 19667721
10 126807809
11 817795362
12 5274346426
13 34015377046
14 219367395594
15 1414720693245
16 9123720789554
17 58840106012423
18 379467286876826
19 2447231592206585
20 15782503349398343

List of values

[7, 39, 281, 1774, 11385, 73136, 472638, 3050285, 19667721, 126807809, 817795362, 5274346426, 34015377046, 219367395594, 1414720693245, 9123720789554, 58840106012423, 379467286876826, 2447231592206585, 15782503349398343]

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

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