# A107417 (b-file synthesized from sequence entry)
0 1
1 18
2 126
3 560
4 1890
5 5292
6 12936
7 28512
8 57915
9 110110
10 198198
11 340704
12 563108
13 899640
14 1395360
15 2108544
16 3113397
17 4503114
18 6393310
19 8925840
20 12273030
21 16642340
22 22281480
23 29484000
24 38595375
25 50019606
26 64226358
27 81758656
28 103241160
29 129389040
30 161017472
31 199051776