# A337591 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 51
4 760
5 15545
6 428256
7 15043483
8 653049664
9 34204348305
10 2118834917200
11 152834879685851
12 12670536337934256
13 1194143629239156505
14 126753440317516749660
15 15031687739886065433375
16 1977667235694725269563136
17 286890421090357737699794209
18 45637300134026406622214264592