A056134 Smallest positive integer which is the geometric mean of n and an integer other than n.

2, 4, 6, 2, 10, 12, 14, 4, 3, 20, 22, 6, 26, 28, 30, 4, 34, 6, 38, 10, 42, 44, 46, 12, 5, 52, 9, 14, 58, 60, 62, 8, 66, 68, 70, 6, 74, 76, 78, 20, 82, 84, 86, 22, 15, 92, 94, 12, 7, 10, 102, 26, 106, 18, 110, 28, 114, 116, 118, 30, 122, 124, 21, 8, 130, 132, 134, 34, 138, 140

Offset

1,1

Links

Table of n, a(n) for n=1..70.

Formula

a(n)=sqrt(n*A056135(n)). If n is squarefree then a(n)=2n, otherwise a(n)=A019554(n)

Crossrefs

Sequence in context: A071294 A060684 A329726 * A097009 A214213 A085593

Adjacent sequences: A056131 A056132 A056133 * A056135 A056136 A056137

Keyword

easy,nonn

Author

Henry Bottomley, Jun 13 2000

Status

approved