# A228309 (b-file synthesized from sequence entry)
2 3
3 105
4 2590
5 57015
6 1165626
7 22834812
8 433178460
9 8036703675
10 146451924190
11 2632740298188
12 46790614294788
13 824017920352900
14 14397367664647800
15 249906966022292400
16 4312825574857068600
17 74063143648813911075