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.

A240647 Number of nX6 0..1 arrays with no element equal to the same number of vertical neighbors as horizontal neighbors, with new values 0..1 introduced in row major order.

Table of values

n a(n)
1 5
2 10
3 60
4 168
5 953
6 5304
7 29481
8 168320
9 990468
10 5920658
11 36118925
12 223452736
13 1398014617
14 8822174770
15 56061936636
16 358120024848
17 2296837339689
18 14776222949736
19 95279221861053
20 615439624491192
21 3980504657629172

List of values

[5, 10, 60, 168, 953, 5304, 29481, 168320, 990468, 5920658, 36118925, 223452736, 1398014617, 8822174770, 56061936636, 358120024848, 2296837339689, 14776222949736, 95279221861053, 615439624491192, 3980504657629172]

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

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