# A218669 (b-file synthesized from sequence entry)
0 1
1 0
2 1
3 7
4 97
5 1561
6 41136
7 1551814
8 72440460
9 4281320257
10 324623105584
11 30086950057627
12 3299720918091511
13 428431079916572044
14 65637957066642609845
15 11659659637028895337265
16 2367270866164121777222596
17 546795407830461739380895161
18 143176487805296033192642234802