# A125316 (b-file synthesized from sequence entry)
0 1
1 6
2 30
3 138
4 694
5 3526
6 18012
7 92140
8 471566
9 2413794
10 12356010
11 63250314
12 323779348
13 1657433992
14 8484446994
15 43432107538
16 222330112286
17 1138113767838
18 5826034724844
19 29823627148788
20 152667942902854