# A138365 (b-file synthesized from sequence entry)
1 10
2 99
3 1090
4 11880
5 129601
6 1413720
7 15421330
8 168220899
9 1835008570
10 20016873360
11 218350598401
12 2381839709040
13 25981886201050
14 283418908502499
15 3091626107326450
16 33724468272088440
17 367877524885646401
18 4012928305470021960
19 43774333835284595170
20 477504743882660524899
21 5208777848873981178730