# A121421 (b-file synthesized from sequence entry)
0 1
1 3
2 12
3 76
4 711
5 9054
6 147471
7 2938176
8 69328365
9 1891371807
10 58575539361
11 2030011517685
12 77827890696820
13 3270046577551695
14 149407542447596319
15 7374639622066056408
16 391044078030333899385
17 22168014954558449549349