# A149387 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 49
5 191
6 815
7 3469
8 15307
9 68013
10 307268
11 1398768
12 6428729
13 29727505
14 138333374
15 646828034
16 3038128475
17 14323832261
18 67765179616
19 321553421700
20 1529953926595
21 7297218756599
22 34881425500517
23 167070104553465
24 801674006390029
25 3853224043493441
26 18548991941844770
27 89419945252812416