# A156084 (b-file synthesized from sequence entry)
0 0
1 4
2 68
3 1224
4 21960
5 394060
6 7071116
7 126886032
8 2276877456
9 40856908180
10 733147469780
11 13155797547864
12 236071208391768
13 4236125953503964
14 76014195954679580
15 1364019401230728480
16 24476335026198433056
17 439210011070341066532