# A074409 (b-file synthesized from sequence entry)
1 0
2 0
3 1
4 4
5 16
6 53
7 160
8 512
9 1706
10 6144
11 23133
12 87380
13 327680
14 1217097
15 4508328
16 16777216
17 62914560
18 237677216
19 902444517
20 3435973836
21 13102206738
22 50026607709
23 191312691200
24 733007751680
25 2814062572336
26 10823317585920
27 41694907460224
28 160842843834660