# A265277 (b-file synthesized from sequence entry)
1 1
2 8
3 108
4 2060
5 50000
6 1495152
7 52706752
8 2148128768
9 99179705664
10 5120302400000
11 292159150705664
12 18260381285388288
13 1240576436601868288
14 91029755275709960192
15 7174453510897286400000
16 604463153576356699148288
17 54214017802982966177103872
18 5157212788407882801908809728
19 518630842213417245507316350976
20 54975582161150857574770073600000