# A009245 (b-file synthesized from sequence entry)
0 1
1 1
2 0
3 0
4 8
5 32
6 56
7 280
8 3968
9 27520
10 133248
11 1072896
12 13993088
13 137702528
14 1139191808
15 12544190464
16 178943504384
17 2268209053696
18 26439024316416
19 366953307820032
20 5943319707680768
21 91839717688770560