# A074408 (b-file synthesized from sequence entry)
1 0
2 1
3 2
4 4
5 11
6 32
7 128
8 512
9 1920
10 6963
11 24576
12 87380
13 317755
14 1179648
15 4438966
16 16777216
17 63406080
18 239541344
19 905969664
20 3435973836
21 13076666409
22 49928994816
23 191126044672
24 733007751680
25 2815436626328
26 10828603699515
27 41705086880768
28 160842843834660