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.

A222447 Sum of neighbor maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal, vertical and antidiagonal neighbors in a random 0..3 nX4 array.

Table of values

n a(n)
1 16
2 210
3 4056
4 65536
5 1048576
6 16750154
7 268430848
8 4294967008
9 68716055088
10 1099511627776
11 17592186044416
12 281474975268864
13 4503599621232000
14 72057594037927936
15 1152921504606846976
16 18446744065442448416

List of values

[16, 210, 4056, 65536, 1048576, 16750154, 268430848, 4294967008, 68716055088, 1099511627776, 17592186044416, 281474975268864, 4503599621232000, 72057594037927936, 1152921504606846976, 18446744065442448416]

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

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