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.

A184556 Number of (n+1) X 2 0..2 arrays with no 2 X 2 subblock summing to less than 4.

Table of values

n a(n)
1 50
2 336
3 2167
4 14180
5 92429
6 603249
7 3935721
8 25680486
9 167558680
10 1093290051
11 7133495992
12 46544663377
13 303694712145
14 1981548052649
15 12929209539882
16 84360538526896
17 550435849841567
18 3591485193655532
19 23433731463177813

List of values

[50, 336, 2167, 14180, 92429, 603249, 3935721, 25680486, 167558680, 1093290051, 7133495992, 46544663377, 303694712145, 1981548052649, 12929209539882, 84360538526896, 550435849841567, 3591485193655532, 23433731463177813]

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

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