# A026977 (b-file synthesized from sequence entry)
1 1
2 4
3 24
4 90
5 365
6 1376
7 7365
8 28002
9 121049
10 465004
11 2437089
12 9396986
13 41758527
14 162167568
15 842470494
16 3277804402
17 14798196587
18 57865149612
19 299015494394
20 1170434872374
21 5339682500573
22 20979019813768
23 107997589923134
24 424558473013940
25 1951503161793927
26 7693926097133316