# A026947 (b-file synthesized from sequence entry)
1 1
2 6
3 24
4 144
5 541
6 3258
7 12275
8 74280
9 282003
10 1713690
11 6549906
12 39938616
13 153481299
14 938430990
15 3622111560
16 22195961280
17 85975792075
18 527816696850
19 2050493623760
20 12607504827600
21 49098707209695
22 302275142049870
23 1179633190545755
24 7270432009471224
25 28423658754983701