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.

A208869 Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors.

Table of values

n a(n)
1 51
2 24472
3 14493405
4 8624977114
5 5134914951163
6 3057224057476808
7 1820216057105650386
8 1083724145919960847502
9 645230025599333921071976
10 384158448692090971917060268
11 228721088397696942173901117684

List of values

[51, 24472, 14493405, 8624977114, 5134914951163, 3057224057476808, 1820216057105650386, 1083724145919960847502, 645230025599333921071976, 384158448692090971917060268, 228721088397696942173901117684]

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

Content is available under The OEIS End-User License Agreement.