# A012143 (b-file synthesized from sequence entry)
0 1
1 1
2 13
3 469
4 33433
5 3984681
6 718210725
7 183013440765
8 62801454477105
9 27970921286867025
10 15708198897246520125
11 10866653910101298549285
12 9083998201236955132833225
13 9030162506735790711308044665