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.

A197989 Number of binary arrangements of total n 1's, without adjacent 1's on n X n array connected n-s.

Table of values

n a(n)
1 1
2 4
3 45
4 886
5 24395
6 860336
7 36914493
8 1863645610
9 108131503623
10 7085585223652
11 517329551346608
12 41634263983867842
13 3661077644199252550
14 349191617521920855488
15 35902782820742394839453
16 3958207187579046500083794
17 465777357329812920074875295

List of values

[1, 4, 45, 886, 24395, 860336, 36914493, 1863645610, 108131503623, 7085585223652, 517329551346608, 41634263983867842, 3661077644199252550, 349191617521920855488, 35902782820742394839453, 3958207187579046500083794, 465777357329812920074875295]

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

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