A186981 Number of ordered 10-tuples of distinct pairwise coprime positive integers with largest element n.

8, 0, 8, 0, 8, 0, 244, 0, 1301, 288, 95, 58, 146, 20, 7089, 331, 571, 172, 25150, 100, 67678, 4036, 3850, 4522, 182152, 3784, 140446, 9592, 32890, 18634, 646954, 14014, 126562, 29788, 93394, 57742, 1655200, 8008, 3102319, 253594, 261118, 505219

Offset: 23

Author

Alois P. Heinz, Mar 02 2011

Keywords

• nonn

Examples

			a(23) = 8 because there are 8 ordered 10-tuples of distinct pairwise coprime positive integers with largest element 23: (1,2,3,5,7,11,13,17,19,23), (1,2,5,7,9,11,13,17,19,23), (1,3,4,5,7,11,13,17,19,23), (1,3,5,7,8,11,13,17,19,23), (1,3,5,7,11,13,16,17,19,23), (1,4,5,7,9,11,13,17,19,23), (1,5,7,8,9,11,13,17,19,23), (1,5,7,9,11,13,16,17,19,23).
		

Links

• Alois P. Heinz, Table of n, a(n) for n = 23..200

Crossrefs

Column 10 of triangle A186972. First differences of A186986.