# A117152 (b-file synthesized from sequence entry)
0 0
1 0
2 1
3 7
4 25
5 75
6 195
7 468
8 1056
9 2280
10 4755
11 9650
12 19154
13 37328
14 71635
15 135685
16 254125
17 471317
18 866669
19 1581620
20 2866970
21 5165630
22 9256871
23 16507092
24 29304660
25 51812160
26 91264885
27 160207603
28 280340161
29 489117135
30 851054535