# A277353 (b-file synthesized from sequence entry)
0 1
1 4
2 52
3 1456
4 71344
5 5422144
6 591013696
7 87470027008
8 16881715212544
9 4119138511860736
10 1239860692070081536
11 451309291913509679104
12 195416923398549691052032
13 99271797086463243054432256
14 58471088483926850159060598784
15 39526455815134550707524964777984