# A083068 (b-file synthesized from sequence entry)
0 1
1 7
2 55
3 439
4 3511
5 28087
6 224695
7 1797559
8 14380471
9 115043767
10 920350135
11 7362801079
12 58902408631
13 471219269047
14 3769754152375
15 30158033218999
16 241264265751991
17 1930114126015927
18 15440913008127415
19 123527304065019319
20 988218432520154551
21 7905747460161236407