# A048987 (b-file synthesized from sequence entry)
0 1
1 20
2 400
3 8902
4 197281
5 4865609
6 119060324
7 3195901860
8 84998978956
9 2439530234167
10 69352859712417
11 2097651003696806
12 62854969236701747
13 1981066775000396239
14 61885021521585529237
15 2015099950053364471960