# A074437 (b-file synthesized from sequence entry)
1 0
2 1
3 3
4 13
5 60
6 214
7 900
8 4908
9 29160
10 167928
11 940896
12 5196096
13 28421280
14 155696585
15 863910489
16 4859490672
17 27554100480
18 156728297088
19 892526107392
20 5087657135000
21 29045467518171
22 166189019079168
23 953309368018944
24 5481559804635648
25 31581615565250142