# A046714 (b-file synthesized from sequence entry)
0 1
1 6
2 32
3 165
4 839
5 4237
6 21317
7 107014
8 536500
9 2687362
10 13453606
11 67326816
12 336842092
13 1684953360
14 8427441240
15 42146901045
16 210769862895
17 1053978959265
18 5270372435025
19 26353629438315
20 131774711311995