# A331658 (b-file synthesized from sequence entry)
0 1
1 2
2 9
3 64
4 617
5 7446
6 107377
7 1795844
8 34114929
9 724822282
10 17018900921
11 437402060712
12 12208463140249
13 367629791490014
14 11876750557295457
15 409663873470828076
16 15023747377122799457
17 583644746007467984274
18 23939828792355240206569
19 1033788018952899566018192