A073128 Integer quotients arising in A063986.

0, 1, 1, 5, 5, 49, 118, 121, 2406, 2698, 4182, 4946, 153627, 3087192, 8203485, 38394376, 487844934, 2822741576, 4140154385, 4397137572, 8583966231

Offset: 1

Author

Labos Elemer, Jul 16 2002

Keywords

• more
• nonn

Examples

			n=15, A063986(15)=41846733, sum of first 41846733 cototients is s=343289046464505, a(15)=s/41846733. Only in knowledge of either the quotients or of partial sums of cototients is it possible to continue A063986 without recomputing previous terms!
		

Crossrefs

Cf. A051953, A000010, A002088, A048920, A000217, A050226, A063986.

Formula

a(n)=Sum[cototient[j], j=1..A063986(n)]/A063986(n)

Extensions

Changed A063896 to A063986 and a(16)-a(21) from Donovan Johnson, May 11 2010