A217140 a(n) = m/n where m is the least number divisible by n such that phi(m) = phi(m+6n).

24, 24, 24, 24, 36, 24, 24, 24, 24, 36, 24, 24, 24, 24, 36, 24, 24, 24, 24, 36, 24, 24, 24, 24, 36, 24, 24, 24, 24, 36, 24, 24, 24, 24, 60, 24, 24, 24, 24, 36, 24, 24, 24, 24, 36, 24, 24, 24, 24, 36, 24, 24, 24, 24, 36, 24, 24, 24, 24, 36, 24, 24, 24, 24, 36

Offset

1,1

Links

Michel Marcus, Table of n, a(n) for n = 1..1000

Example

A179188(1)=24 is divisible by 1 and the quotient is 24, so a(1)=24.
A217139(1)=48 is divisible by 2 and the quotient is 24, so a(2)=24.
The first solution to phi(n)=phi(n+18) to be divisible by 3 is 72 and the quotient is 24, so a(3)=24.

Crossrefs

Cf. A007015, A179188, A217139, A217141, A217068.

Sequence in context: A308419 A010863 A362116 * A235249 A115028 A099543

Adjacent sequences: A217137 A217138 A217139 * A217141 A217142 A217143

Keyword

nonn

Author

Michel Marcus and Jonathan Sondow, Oct 01 2012

Status

approved