# A056053 (b-file synthesized from sequence entry)
1 3
2 15
3 113
4 837
5 6183
6 45691
7 337607
8 2494595
9 18432707
10 136200301
11 1006391657
12 7436284415
13 54947122715
14 406007372211
15 3000011249847
16 22167251422541
17 163795064320249
18 1210290918990281
19 8942907496445513
20 66079645178783351