# A287819 (b-file synthesized from sequence entry)
0 1
1 9
2 71
3 561
4 4433
5 35031
6 276827
7 2187585
8 17287073
9 136608591
10 1079529611
11 8530826457
12 67413620993
13 532726379847
14 4209793089371
15 33267280400913
16 262889866978817
17 2077449112980255
18 16416740845208075
19 129730917736941417
20 1025179795159015841