# A151500 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 28
4 202
5 1634
6 14356
7 134442
8 1320582
9 13475838
10 141858494
11 1532365936
12 16917613816
13 190293921824
14 2175382137928
15 25222807343938
16 296126634648206
17 3515506441807942
18 42152202377678462
19 509971838967101524
20 6220118724701272900
21 76429469578696026476
22 945490543715011286048