# A084518 (b-file synthesized from sequence entry)
1 1
2 2
3 5
4 18
5 65
6 238
7 877
8 3234
9 11929
10 44006
11 162341
12 598890
13 2209361
14 8150542
15 30068125
16 110924178
17 409209865
18 1509614198
19 5569110677
20 20544980154
21 75792390209
22 279605352286
23 1031490797581
24 3805267877730
25 14037995932921