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A051266 Numbers n such that maximal value of prime divisors of reduced residue system for n is 2. 1
7, 11, 13, 15, 16, 17, 19, 21, 22, 23, 25, 26, 27, 28, 29, 32, 33, 34, 35, 36, 38, 39, 40, 44, 45, 46, 48, 50, 51, 52, 54, 56, 57, 58, 62, 63, 64, 66, 68, 69, 70, 72, 74, 75, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 105, 108, 110, 112, 114, 120, 126 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..66.

EXAMPLE

n=29 is here because for terms of RRS[ 29 ]={1,2,...,27,28} the number of prime divisors is 0(for 1), 1(for prime powers) or 2 (for 6,10,12,14,15,18,20,21,22,24,26,28).

CROSSREFS

Cf. A048597, A051250, A002110, A051265-A051268.

Sequence in context: A075930 A014311 A245178 * A172247 A172120 A112090

Adjacent sequences:  A051263 A051264 A051265 * A051267 A051268 A051269

KEYWORD

nonn

AUTHOR

Labos Elemer

STATUS

approved

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Last modified March 28 02:40 EDT 2017. Contains 284182 sequences.