# A132428 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 10
4 43
5 216
6 1241
7 7988
8 56763
9 440254
10 3693728
11 33281359
12 320112326
13 3270177860
14 35329070470
15 402128329243
16 4806784533967
17 60166803598106
18 786622663286330
19 10717555856584617
20 151864784070048105