A053627 - OEIS

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

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OFFSET

1,2

COMMENTS

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

LINKS

Table of n, a(n) for n=1..74.

EXAMPLE

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.

Sequence in context: A348401 A324932 A348941 * A319626 A125746 A337376

Adjacent sequences: A053624 A053625 A053626 * A053628 A053629 A053630

KEYWORD

nonn

AUTHOR

Henry Bottomley, Mar 20 2000

STATUS

approved