# 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