# A135889 (b-file synthesized from sequence entry)
0 1
1 3
2 12
3 63
4 421
5 3472
6 34380
7 399463
8 5344770
9 81097517
10 1377986373
11 25947738574
12 536726987593
13 12104879913657
14 295754724799758
15 7784814503249896
16 219682110287448760
17 6617691928179590112