# A124544 (b-file synthesized from sequence entry)
0 1
1 4
2 26
3 156
4 939
5 5764
6 36248
7 233900
8 1549193
9 10529052
10 73390856
11 524300728
12 3836318617
13 28731858368
14 220121136396
15 1724083566552
16 13798004944813
17 112773980097516
18 940841899662784
19 8008011665402152
20 69505777613953576