# A321968 (b-file synthesized from sequence entry)
0 -1
1 3
2 7
3 55
4 735
5 13851
6 336743
7 10024911
8 353109375
9 14361853555
10 662358958599
11 34154042002983
12 1947046027041503
13 121593475341796875
14 8255204941334951655
15 605377094064557529151
16 47687467918910168180223
17 4015909348423983176411619