OFFSET
1,2
COMMENTS
This group of sequences is useful when looking for a number >= n to use as the basis for a Fast Fourier Transform when you have n data points.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
si[n_]:=Module[{k=n}, While[Max[FactorInteger[k][[All, 1]]]>5, k++]; k]; Array[ si, 70] (* Harvey P. Dale, Oct 14 2019 *)
PROG
(R) f <- function(n) nextn(n, factors = c(2, 3, 5))
a <- matrix(1:256, ncol=1)
apply(a, 1, f)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Aug 23 2009
STATUS
approved