# A048721 (b-file synthesized from sequence entry)
0 0
1 1
2 3
3 7
4 23
5 151
6 4247
7 1052823
8 8590987415
9 18014407100469399
10 309485009839359475825250455
11 11150372599265311880252868975683656578240663
12 6901746346790563787434755873427398051716420852423255530846180802039959