# A054542 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 12
5 36
6 116
7 382
8 1287
9 4420
10 15397
11 54264
12 193154
13 693374
14 2507288
15 9124560
16 33393355
17 122821380
18 453756765
19 1683107800
20 6265751310
21 23402516280
22 87670790155
23 329337229104
24 1240292449350
25 4681874312510
26 17711376176718
27 67135842263728
28 254956353358682