# A022041 (b-file synthesized from sequence entry)
0 2
1 6
2 19
3 61
4 196
5 630
6 2026
7 6516
8 20957
9 67403
10 216786
11 697242
12 2242518
13 7212542
14 23197478
15 74609338
16 239963729
17 771787993
18 2482278087
19 7983674995
20 25677649398
21 82586237418
22 265619586324
23 854304141280
24 2747672247776