# A205773 (b-file synthesized from sequence entry)
0 1
1 3
2 21
3 156
4 1335
5 12153
6 116778
7 1160715
8 11848530
9 123420648
10 1306709841
11 14019657771
12 152092615971
13 1665531792021
14 18386262679557
15 204393214435791
16 2286101345820933
17 25708109998131381
18 290490321604346535
19 3296566844230833750
20 37555644504960139647