# A037599 (b-file synthesized from sequence entry)
1 1
2 9
3 54
4 325
5 1953
6 11718
7 70309
8 421857
9 2531142
10 15186853
11 91121121
12 546726726
13 3280360357
14 19682162145
15 118092972870
16 708557837221
17 4251347023329
18 25508082139974
19 153048492839845
20 918290957039073
21 5509745742234438