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.

A130578 Number of different possible rows (or columns) in an n X n crossword puzzle.

Table of values

n a(n)
1 0
2 0
3 1
4 3
5 6
6 10
7 16
8 26
9 43
10 71
11 116
12 188
13 304
14 492
15 797
16 1291
17 2090
18 3382
19 5472
20 8854
21 14327
22 23183
23 37512
24 60696
25 98208
26 158904
27 257113
28 416019
29 673134
30 1089154
31 1762288
32 2851442
33 4613731
34 7465175
35 12078908
36 19544084

List of values

[0, 0, 1, 3, 6, 10, 16, 26, 43, 71, 116, 188, 304, 492, 797, 1291, 2090, 3382, 5472, 8854, 14327, 23183, 37512, 60696, 98208, 158904, 257113, 416019, 673134, 1089154, 1762288, 2851442, 4613731, 7465175, 12078908, 19544084]

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

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