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.

A329094 a(n) is the number of solutions when placing the numbers 1..n in an n X n square according to the rules in the Comments section.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 1
6 3
7 3
8 8
9 17
10 18
11 51
12 69
13 126
14 286
15 485
16 1180
17 2245
18 4312
19 7247
20 19559
21 41403
22 66454
23 161131
24 337495
25 710899
26 1286527
27 3069554
28 7100614
29 15046664
30 29090692
31 57797782
32 144576706
33 313441617
34 628544270
35 1278592587
36 3304149943
37 7192582862

List of values

[1, 1, 1, 1, 1, 3, 3, 8, 17, 18, 51, 69, 126, 286, 485, 1180, 2245, 4312, 7247, 19559, 41403, 66454, 161131, 337495, 710899, 1286527, 3069554, 7100614, 15046664, 29090692, 57797782, 144576706, 313441617, 628544270, 1278592587, 3304149943, 7192582862]