# A037664 (b-file synthesized from sequence entry)
1 3
2 25
3 200
4 1603
5 12825
6 102600
7 820803
8 6566425
9 52531400
10 420251203
11 3362009625
12 26896077000
13 215168616003
14 1721348928025
15 13770791424200
16 110166331393603
17 881330651148825
18 7050645209190600