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.

A222937 Sum of neighbor maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal and antidiagonal neighbors in a random 0..3 3Xn array.

Table of values

n a(n)
1 8
2 64
3 512
4 4000
5 32760
6 262104
7 2097152
8 16777216
9 134217728
10 1073741824
11 8589499198
12 68719476736
13 549755813888
14 4398046511104
15 35184372088832
16 281474975268864
17 2251799813683712
18 18014398509056000
19 144115188075855872

List of values

[8, 64, 512, 4000, 32760, 262104, 2097152, 16777216, 134217728, 1073741824, 8589499198, 68719476736, 549755813888, 4398046511104, 35184372088832, 281474975268864, 2251799813683712, 18014398509056000, 144115188075855872]