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.

A233069 Number of nX4 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 in row major order.

Table of values

n a(n)
1 14
2 289
3 6854
4 164495
5 3957778
6 95264272
7 2293174089
8 55201144642
9 1328800293991
10 31986846738550
11 769986578444547
12 18535097820450198
13 446176415304028392
14 10740347610658418594
15 258541381485766745236

List of values

[14, 289, 6854, 164495, 3957778, 95264272, 2293174089, 55201144642, 1328800293991, 31986846738550, 769986578444547, 18535097820450198, 446176415304028392, 10740347610658418594, 258541381485766745236]

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

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