# A091947 (b-file synthesized from sequence entry)
0 0
1 1
2 21
3 331
4 4641
5 61051
6 771561
7 9487171
8 14358881
9 357947691
10 5937424601
11 85311670611
12 138428376721
13 4522712143931
14 79749833583241
15 177248169415651
16 5949729863572161
17 5447028499293771
18 559917313492231481