# A016195 (b-file synthesized from sequence entry)
0 0
1 1
2 21
3 331
4 4641
5 61051
6 771561
7 9487171
8 114358881
9 1357947691
10 15937424601
11 185311670611
12 2138428376721
13 24522712143931
14 279749833583241
15 3177248169415651
16 35949729863572161
17 405447028499293771