# A074430 (b-file synthesized from sequence entry)
1 0
2 0
3 3
4 12
5 36
6 162
7 1008
8 6048
9 33048
10 176256
11 940896
12 5038848
13 27433728
14 152845056
15 863910489
16 4899999744
17 27770211072
18 157340548224
19 892662156288
20 5078255822436
21 28988793435209
22 166023914360832
23 953309368018944
24 5484237660094464
25 31596861676172076