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.

A202329 Number of (n+1)X(n+1) binary arrays with consecutive windows of two bits considered as a binary number nondecreasing in every row and column.

Table of values

n a(n)
1 16
2 48
3 162
4 576
5 2102
6 7790
7 29174
8 110112
9 418134
10 1595622
11 6113746
12 23505358
13 90633802
14 350351642
15 1357278302
16 5268292832
17 20483876822
18 79765662902
19 311038321442
20 1214362277702
21 4746455801882
22 18570960418922
23 72728638093802

List of values

[16, 48, 162, 576, 2102, 7790, 29174, 110112, 418134, 1595622, 6113746, 23505358, 90633802, 350351642, 1357278302, 5268292832, 20483876822, 79765662902, 311038321442, 1214362277702, 4746455801882, 18570960418922, 72728638093802]

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

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