# A006647 (b-file synthesized from sequence entry)
4 1
5 1
6 3
7 6
8 15
9 33
10 83
11 202
12 527
13 1377
14 3744
15 10335
16 29297
17 84396
18 248034
19 740289
20 2245094
21 6904206
22 21522973
23 67936799
24 217026480
25 701159919
26 2289925258
27 7556363054
28 25184139149
29 84743377436
30 287815771822
31 986345040471
32 3409869008578