# A007175 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 3
5 8
6 40
7 211
8 1406
9 9754
10 71591
11 537699
12 4131943
13 32271490
14 255690412
15 2050376883
16 16616721067
17 135920429975
18 1120999363012
19 9313779465810
20 77897862860818
21 655433405297407
22 5544948758579214
23 47143948331898873
24 402655164736641843
25 3453509765971944236
26 29734988097830504532