# A066974 (b-file synthesized from sequence entry)
1 2
2 4
3 70
4 2197
5 86944
6 305045
7 184940110
8 480921672850
9 1390639119568762
10 13871716673121190349872
11 46286334476836197400150816
12 158305268738561655232891129492
13 552015921314537446560239006496196