# A207321 (b-file synthesized from sequence entry)
0 0
1 3
2 18
3 111
4 750
5 5403
6 40572
7 313407
8 2471166
9 19791003
10 160459068
11 1313922063
12 10847561088
13 90174127683
14 754009158018
15 6336733626111
16 53489159252670
17 453258909448635
18 3854034482891724
19 32871004555812111
20 281127047928811200
21 2410285909684370787
22 20711470169495359602
23 178337708176330555839