# A138453 (b-file synthesized from sequence entry)
1 24
2 324
3 7500
4 57624
5 878460
6 2399124
7 12027024
8 23457780
9 73878024
10 297058020
11 443290080
12 1281926124
13 2373639240
14 3158972124
15 5387167824
16 11078235324
17 21084208140
18 25753264260
19 45219115524
20 64037436120
21 75652914024