# A073013 (b-file synthesized from sequence entry)
1 1
2 6
3 37
4 255
5 1991
6 17598
7 174924
8 1937715
9 23696029
10 317105778
11 4608337064
12 72249308222
13 1215116713110
14 21816229444012
15 416367513788760
16 8415762294812355
17 179556294350582865
18 4032049130587198650
19 95044828751874519840
20 2346284236366567126410
21 60527222877161072721930