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.

A285146 Number of n X 2 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1.

Table of values

n a(n)
1 0
2 2
3 12
4 56
5 236
6 950
7 3752
8 14684
9 57192
10 222308
11 863808
12 3357766
13 13061980
14 50859826
15 198235896
16 773453896
17 3020781528
18 11809145656
19 46207264696
20 180955506800
21 709219185000
22 2781727573396
23 10918267462160
24 42882371536718

List of values

[0, 2, 12, 56, 236, 950, 3752, 14684, 57192, 222308, 863808, 3357766, 13061980, 50859826, 198235896, 773453896, 3020781528, 11809145656, 46207264696, 180955506800, 709219185000, 2781727573396, 10918267462160, 42882371536718]

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

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