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.

A209728 1/4 the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having distinct edge sums.

Table of values

n a(n)
1 22
2 1096
3 137888
4 47572464
5 45147495264
6 121396901813560
7 914481225452329872
8 19676655455650623737848

List of values

[22, 1096, 137888, 47572464, 45147495264, 121396901813560, 914481225452329872, 19676655455650623737848]