# A135944 (b-file synthesized from sequence entry)
1 4
2 4
3 15
4 38
5 128
6 389
7 1325
8 4643
9 16623
10 59241
11 214432
12 781471
13 2884201
14 10687480
15 39838489
16 149172297
17 560795383
18 2115430020