# A115254 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 7
4 19
5 52
6 162
7 505
8 1666
9 5576
10 19135
11 66494
12 234316
13 833620
14 2992817
15 10822802
16 39395434
17 144207387
18 530534468
19 1960521470
20 7273963575
21 27085625086
22 101188629692
23 379160330195
24 1424634014730
25 5366319233160