# A356952 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 0
4 4
5 10
6 20
7 35
8 1736
9 15204
10 88320
11 415965
12 7632460
13 121801966
14 1368227224
15 12184672955
16 176889193040
17 3490851044360
18 59703361471296
19 837948141904569
20 13407228541467540
21 283596013866706450
22 6226093732482731800
23 121326684752194084471