# A016261 (b-file synthesized from sequence entry)
0 1
1 20
2 291
3 3730
4 44681
5 513240
6 5730271
7 62683550
8 675263061
9 7188478660
10 75807419051
11 793377882570
12 8251512054241
13 85374719599280
14 879483587504631
15 9026463398652790
16 92349281698986221
17 942254646401987100
18 9591402928728995011
19 97433737469672066210