# A028545 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 6240
4 64910
5 624128
6 3928640
7 21820160
8 102066525
9 435107840
10 1681228928
11 6065581440
12 20483625750
13 65651665920
14 200400925120
15 587021103104
16 1655255008870
17 4513857474560
18 11934605001600
19 30689664533440
20 76909902651384
21 188251191994880
22 450777531819200