# A148950 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 30
5 102
6 397
7 1490
8 5979
9 24287
10 100419
11 422102
12 1801426
13 7746419
14 33739171
15 147966234
16 654198310
17 2911588244
18 13035624845
19 58685408132
20 265476086946
21 1206287649767
22 5504182850662
23 25206318950786
24 115837181027184
25 534037927543324
26 2469248650622062
27 11448682897131052
28 53217754670807911