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.

A185513 Number of (n+1) X 2 0..2 arrays with every 2 X 2 subblock singular.

Table of values

n a(n)
1 31
2 143
3 593
4 2553
5 10847
6 46303
7 197329
8 841449
9 3587359
10 15295151
11 65211089
12 278030937
13 1185395807
14 5053987327
15 21547889233
16 91870352457
17 391693178911
18 1670000659151
19 7120119353681
20 30356933960889
21 129428088631391

List of values

[31, 143, 593, 2553, 10847, 46303, 197329, 841449, 3587359, 15295151, 65211089, 278030937, 1185395807, 5053987327, 21547889233, 91870352457, 391693178911, 1670000659151, 7120119353681, 30356933960889, 129428088631391]

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

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