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.

A221067 Sum of neighbor maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their king-move neighbors in a random 0..3 nX3 array.

Table of values

n a(n)
1 8
2 20
3 512
4 4096
5 26976
6 262144
7 2097152
8 16401664
9 134217728
10 1073741824
11 8572235776
12 68719476736
13 549755813888
14 4397319143424
15 35184372088832
16 281474976710656
17 2251771635433472
18 18014398509481984
19 144115188075855872

List of values

[8, 20, 512, 4096, 26976, 262144, 2097152, 16401664, 134217728, 1073741824, 8572235776, 68719476736, 549755813888, 4397319143424, 35184372088832, 281474976710656, 2251771635433472, 18014398509481984, 144115188075855872]

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

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