# A037773 (b-file synthesized from sequence entry)
1 3
2 16
3 80
4 402
5 2013
6 10066
7 50330
8 251652
9 1258263
10 6291316
11 31456580
12 157282902
13 786414513
14 3932072566
15 19660362830
16 98301814152
17 491509070763
18 2457545353816
19 12287726769080
20 61438633845402
21 307193169227013