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A057338 Occurrences of most frequently occurring number in 1-to-n multiplication cube. 8
1, 3, 6, 9, 9, 15, 15, 21, 24, 24, 24, 36, 36, 36, 48, 51, 51, 57, 57, 75, 75, 75, 75, 90, 90, 90, 90, 90, 90, 114, 114, 114, 114, 114, 126, 138, 138, 138, 138, 156, 156, 180, 180, 180, 198, 198, 198, 207, 207, 207, 207, 207, 207, 207, 207, 237, 237, 237, 237, 267 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
David A. Corneth, Table of n, a(n) for n = 1..10000 (first 250 terms from Reinhard Zumkeller, terms 251..500 from Branden Aldridge).
EXAMPLE
M(n) is the array in which m(x,y,z)=x*y*z for x = 1 to n, y = 1 to n and z = 1 to n. In M(7) the most frequently occurring numbers are 12 and 24. They occur 15 times, so a(7) = 15.
PROG
(Haskell)
import Data.List (group, sort)
a057338 n = head $ reverse $ sort $ map length $ group $
sort [u * v * w | u <- [1..n], v <- [1..n], w <- [1..n]]
-- Reinhard Zumkeller, Jun 22 2013
CROSSREFS
Sequence in context: A007844 A224523 A159785 * A337603 A077856 A239977
KEYWORD
nonn,look
AUTHOR
Neil Fernandez, Aug 28 2000
EXTENSIONS
More terms from David W. Wilson, Aug 28 2001
STATUS
approved

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Last modified July 21 03:47 EDT 2024. Contains 374463 sequences. (Running on oeis4.)