# A008270 (b-file synthesized from sequence entry)
1 1
2 20
3 507
4 19552
5 1113485
6 88725876
7 9452410135
8 1299140690912
9 223938108997497
10 47323772172058420
11 12033854264863090451
12 3625294706255832787200
13 1276951433895343148472517