# A127115 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 30
5 170
6 1320
7 11660
8 116600
9 1304600
10 15657400
11 230212400
12 3443176000
13 56312146000
14 1211416624000
15 23016735654000
16 460356735300000
17 12067735663300000
18 265756631234600000
19 6601271140642200000