# A268214 (b-file synthesized from sequence entry)
0 0
1 0
2 1
3 4
4 19
5 72
6 302
7 1144
8 4643
9 17680
10 70874
11 271320
12 1081742
13 4160240
14 16543932
15 63871920
16 253681955
17 982571040
18 3900295586
19 15147970200
20 60117323162
21 234025162800
22 928766304388
23 3622709520144
24 14378870714254
25 56182491750112
26 223031678941252