# A074188 (b-file synthesized from sequence entry)
1 1
2 4
3 8
4 25
5 121
6 729
7 5041
8 40401
9 363609
10 3629025
11 39917124
12 479040769
13 6227103744
14 87178467600
15 1307674583296
16 20922793332736
17 355687454263684
18 6402373820077225
19 121645100663836929
20 2432902009335560361