# A151237 (b-file synthesized from sequence entry)
0 1
1 3
2 14
3 63
4 298
5 1428
6 6906
7 33653
8 164836
9 810060
10 3993446
11 19727978
12 97630392
13 483860652
14 2400763156
15 11923446689
16 59266186460
17 294785399216
18 1467099385086
19 7305154655534
20 36390338352432
21 181345090767820
22 903997336345772
23 4507679568564746
24 22482713911686816
25 112160886877865048