# A001852 (b-file synthesized from sequence entry)
1 0
2 1
3 6
4 44
5 430
6 5322
7 79184
8 1381144
9 27730602
10 630422390
11 16006336852
12 448982630340
13 13792542282974
14 460632431511826
15 16620059192605080
16 644338908974954672
17 26713929408696716242
18 1179487563859389821166