# A307996 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 15
4 73
5 410
6 2591
7 18165
8 139266
9 1155509
10 10293729
11 97815520
12 986113613
13 10499247005
14 117603042220
15 1381191356979
16 16958788930317
17 217132031279842
18 2892337840164051
19 40002168264724193
20 573363461815952802
21 8502905138072937073
22 130268705062115090965
23 2058969680487762098496