# A075509 (b-file synthesized from sequence entry)
0 1
1 1
2 11
3 131
4 1761
5 27601
6 506651
7 10674211
8 251686881
9 6524202561
10 183991725451
11 5605930566051
12 183428104316161
13 6409252239788881
14 237948848526923611
15 9346097294356706051
16 386966245108218203201
17 16836505067572362863361
18 767645305770283165781131