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.

A253291 Number of (n+1)X(3+1) 0..2 arrays with every 2X2 subblock sum differing from its neighbors horizontally, vertically, diagonally and antidiagonally.

Table of values

n a(n)
1 3844
2 23546
3 140536
4 1029888
5 7431136
6 52784020
7 376392916
8 2705942488
9 19441124904
10 139538118106
11 1001630063642
12 7192898044676
13 51663362450690
14 371000801080586
15 2664302414067690
16 19133126021242278
17 137412998986250836

List of values

[3844, 23546, 140536, 1029888, 7431136, 52784020, 376392916, 2705942488, 19441124904, 139538118106, 1001630063642, 7192898044676, 51663362450690, 371000801080586, 2664302414067690, 19133126021242278, 137412998986250836]