# A025571 (b-file synthesized from sequence entry)
1 1
2 3
3 19
4 140
5 1090
6 8749
7 71604
8 593997
9 4976785
10 42016975
11 356879250
12 3046096983
13 26105109424
14 224485080580
15 1936029865870
16 16738879226139
17 145041018993018
18 1259189426140919
19 10950454909118725
20 95374995078513150
21 831822673255797630
22 7263789225782699928