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.

A239539 Number of (5+1)X(n+1) 0..2 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..2 introduced in row major order.

Table of values

n a(n)
1 47
2 406
3 13254
4 293741
5 7199001
6 171712936
7 4125560328
8 98927618805
9 2373444167504
10 56935033821392
11 1365829523251090
12 32764912977503476
13 786000316204257639
14 18855415452720965204
15 452323942169129930212

List of values

[47, 406, 13254, 293741, 7199001, 171712936, 4125560328, 98927618805, 2373444167504, 56935033821392, 1365829523251090, 32764912977503476, 786000316204257639, 18855415452720965204, 452323942169129930212]

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

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