# A009683 (b-file synthesized from sequence entry)
0 0
1 2
2 12
3 222
4 8120
5 478810
6 41517828
7 4965965942
8 783389808112
9 157572900435762
10 39359784790117500
11 11953192658425797262
12 4337232551752795660968
13 1853172813592086586350218