# A337003 (b-file synthesized from sequence entry)
1 1
2 4
3 18
4 32
5 250
6 72
7 3430
8 6400
9 34506
10 29000
11 705430
12 1254816
13 10400598
14 8281392
15 86567400
16 300533760
17 2333606218
18 2172355848
19 35345263798
20 68442424000
21 332533406646
22 554415527952
23 8233430727598
24 12704658876288
25 105035376968750