# A047124 (b-file synthesized from sequence entry)
2 1
3 1
4 6
5 22
6 86
7 335
8 1307
9 5071
10 19664
11 76299
12 296396
13 1152682
14 4487818
15 17492162
16 68252789
17 266589233
18 1042279572
19 4078677195
20 15974343417
21 62614027433
22 245608306154
23 964087953123
24 3786809126547
25 14883181075527