# A162744 (b-file synthesized from sequence entry)
0 1
1 7
2 42
3 231
4 1260
5 6825
6 36960
7 200025
8 1082550
9 5858475
10 31704750
11 171577875
12 928536000
13 5024998125
14 27194002500
15 147166963125
16 796429856250
17 4310074059375
18 23325015131250
19 126228998109375
20 683118955312500