# A061690 (b-file synthesized from sequence entry)
1 0
2 0
3 6
4 72
5 650
6 5400
7 43757
8 353192
9 2862330
10 23352300
11 191891117
12 1587587760
13 13215894133
14 110619113423
15 930376519256
16 7858437064232
17 66627124896218
18 566791391339532
19 4836144006188165
20 41375938305568772
21 354859541163656045