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A268360 "Four"ier sequence: there is a unique base b >= 5 such that (n base b) contains the largest number of 4's. 1
9, 10, 11, 12, 13, 15, 17, 24, 28, 32, 36, 40, 44, 48, 49, 52, 56, 60, 68, 72, 74, 76, 80, 81, 84, 88, 92, 96, 99, 108, 109, 112, 114, 116, 119, 122, 123, 124, 128, 130, 132, 140, 149, 152, 154, 156, 166, 170, 171, 172, 173, 174, 176, 178, 179, 180, 184, 188, 192, 199 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..60.

EXAMPLE

130 is in the list because 130 in base 7 is written 244, and this is the only base where 130 contains two 4's.

CROSSREFS

See also the Fouriest transform of n, A268236.

Sequence in context: A181699 A281196 A001731 * A297263 A296704 A297137

Adjacent sequences:  A268357 A268358 A268359 * A268361 A268362 A268363

KEYWORD

nonn,base

AUTHOR

Erich Friedman, Feb 03 2016

STATUS

approved

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Last modified October 17 19:44 EDT 2019. Contains 328128 sequences. (Running on oeis4.)