# A249476 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 35
4 242
5 1773
6 15056
7 136652
8 1393722
9 15257919
10 183206388
11 2347929936
12 32602306542
13 479885400177
14 7563888117504
15 125952344438838
16 2225653414414386
17 41351620513521627
18 810520833521436732
19 16633643598838880244
20 358221783030360367014
21 8051927483267030640573