# A113994 (b-file synthesized from sequence entry)
0 1
1 3
2 9
3 27
4 89
5 327
6 1353
7 6303
8 32953
9 192395
10 1247473
11 8931643
12 70221841
13 603040399
14 5628477521
15 56832554399
16 618172840753
17 7214736795987
18 90023735419577
19 1196943617218715
20 16905957430843689
21 252946811300548119