# A026982 (b-file synthesized from sequence entry)
1 1
2 6
3 24
4 120
5 460
6 2214
7 8475
8 40164
9 154235
10 724742
11 2792579
12 13050280
13 50432693
14 234766510
15 909442512
16 4221139640
17 16384219216
18 75873259406
19 294977735364
20 1363503281324
21 5308113306398
22 24499364386598
23 95483014454706
24 440147035814920
25 1717035728143720
26 7906666535747934