# A028550 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 4920
4 89955
5 977769
6 7670445
7 48447405
8 260865495
9 1241931125
10 5354625996
11 21268009665
12 78809488530
13 275102649810
14 911548565730
15 2884607044338
16 8761626447030
17 25649311876605
18 72623115075205
19 199467098107110
20 532810313084637
21 1387200530781195