# A285270 (b-file synthesized from sequence entry)
0 1
1 2
2 14
3 180
4 3340
5 80600
6 2389704
7 83965616
8 3409634960
9 157077960480
10 8093278209760
11 461113571640128
12 28784033772836544
13 1953535902100115840
14 143219579014652040320
15 11279408109860685024000
16 949705205977314865582336
17 85131076752851318807814656
18 8094279370190580822082014720