# A006225 (b-file synthesized from sequence entry)
0 0
1 1
2 3
3 13
4 55
5 445
6 7121
7 113947
8 3646325
9 99147089
10 2050446459
11 125018193357
12 5616378432777
13 30417995237783
14 6566814307004221
15 383349575034664217
16 5168339287595575151
17 549730084897741831651
18 22737447826678001578373