A053627 Smallest integer which is the harmonic mean of n and an integer.

1, 2, 3, 4, 5, 3, 7, 8, 9, 10, 11, 6, 13, 14, 5, 16, 17, 9, 19, 8, 21, 22, 23, 12, 25, 26, 27, 7, 29, 10, 31, 32, 33, 34, 20, 18, 37, 38, 39, 16, 41, 12, 43, 44, 9, 46, 47, 24, 49, 50, 51, 52, 53, 27, 55, 14, 57, 58, 59, 20, 61, 62, 28, 64, 65, 11, 67, 68, 69, 40, 71, 16, 73, 74

Offset: 1

Author

Henry Bottomley, Mar 20 2000

Keywords

• nonn

Comments

if a(n)<>n then n is in A005279

Examples

			a(6)=3 because 3 is the harmonic mean of 6 and 2 and neither 2 nor 1 are the harmonic means of 6 and an integer
		

Crossrefs

Cf. A005279.