# A174967 (b-file synthesized from sequence entry)
0 1
1 3
2 21
3 273
4 10101
5 316407
6 6914271
7 2424626841
8 346084535811
9 6177672967557
10 1741866776384007
11 92264158181274807
12 103008522046409631057
13 22810816825458528984663
14 2220066397007943013450011
15 545889722100356705628041121
16 73293936170018923619553695493