# A272482 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 25
4 455
5 14301
6 683067
7 45956625
8 4136759055
9 479777869285
10 69653708853443
11 12371662732650585
12 2638795469278520279
13 665531624367489426925
14 195911141957772574473675
15 66564029296445548535841825
16 25853886516555100370014075935
17 11383146182215029605579802759285
18 5639331535011059552351840518792275
19 3122923020612123544335165657648107625
20 1921790647828858936591348065677192750055