# A215266 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 26
4 258
5 3346
6 54108
7 1054256
8 24161966
9 634230122
10 18806776982
11 622011916184
12 22754818956246
13 912075762692584
14 39755634279964662
15 1872279469323840472
16 94783193260373606758
17 5135585509536795416348
18 296656123838796109849526
19 18200829821539972354967252