# A068846 (b-file synthesized from sequence entry)
0 11
1 61
2 367
3 2161
4 12967
5 77761
6 466561
7 2799361
8 16796161
9 100776967
10 604661767
11 36279705641
12 217678233631
13 1306069401601
14 7836416409623
15 47018498457641
16 282110990745637
17 1692665944473601
18 1015599566684161