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A151970 a(n) = smallest integer >= n which has only prime factors 3 and 5. 2
1, 3, 3, 5, 5, 9, 9, 9, 9, 15, 15, 15, 15, 15, 15, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 27, 27, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..72.

PROG

(R) f <- function(n) nextn(n, factors = c(3, 5))

a <- matrix(1:256, ncol=1)

apply(a, 1, f)

CROSSREFS

Cf. A130916, A134361, A151969.

Sequence in context: A240313 A275369 A062130 * A049644 A147472 A146914

Adjacent sequences:  A151967 A151968 A151969 * A151971 A151972 A151973

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 23 2009; corrected Mar 07 2012

STATUS

approved

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Last modified July 2 16:47 EDT 2020. Contains 335404 sequences. (Running on oeis4.)