# A037677 (b-file synthesized from sequence entry)
1 1
2 7
3 51
4 360
5 2521
6 17647
7 123531
8 864720
9 6053041
10 42371287
11 296599011
12 2076193080
13 14533351561
14 101733460927
15 712134226491
16 4984939585440
17 34894577098081
18 244262039686567
19 1709834277805971