# A058824 (b-file synthesized from sequence entry)
0 1
1 9
2 45
3 489
4 4941
5 47241
6 443001
7 4099689
8 37666701
9 344373849
10 3138111873
11 28528236009
12 258893786601
13 2346337687689
14 21242736192681
15 192165056625657
16 1737206429739021
17 15696171011450889
18 141756044468718681
19 1279754258848097769
20 11549782186278421905
21 104208561077631046089