# A030970 (b-file synthesized from sequence entry)
1 2
2 4
3 13
4 53
5 267
6 1602
7 11216
8 89733
9 807604
10 8076042
11 88836472
12 1066037665
13 13858489652
14 194018855141
15 2910282827124
16 46564525233992
17 791596928977869
18 14248744721601653
19 270726149710431419
20 5414522994208628397