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.

A233143 Number of nX4 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.

Table of values

n a(n)
1 23
2 3727
3 845917
4 198313130
5 46648134615
6 10976545771938
7 2582927810338210
8 607799571521107132
9 143023917159921251486
10 33655571006177475521033
11 7919636704985653736563452
12 1863603667625659594920136702

List of values

[23, 3727, 845917, 198313130, 46648134615, 10976545771938, 2582927810338210, 607799571521107132, 143023917159921251486, 33655571006177475521033, 7919636704985653736563452, 1863603667625659594920136702]

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

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