A186976 Number of ordered quintuples of distinct pairwise coprime positive integers with largest element n.

2, 1, 3, 0, 26, 1, 72, 9, 14, 29, 228, 15, 431, 55, 115, 75, 928, 70, 743, 205, 633, 225, 2499, 70, 3571, 958, 1085, 728, 1626, 350, 6979, 1231, 2061, 822, 10800, 450, 13978, 2361, 2750, 2772, 20114, 1507, 15718, 2761, 7370, 4422, 33082, 2457, 13971

Offset: 7

Author

Alois P. Heinz, Mar 01 2011

Keywords

• nonn

Examples

			a(7) = 2 because there are 2 ordered quintuples of distinct pairwise coprime positive integers with largest element 7: (1,2,3,5,7), (1,3,4,5,7).
		

Links

• Alois P. Heinz, Table of n, a(n) for n = 7..200

Crossrefs

Column 5 of triangle A186972. First differences of A015698.