A268360 "Four"ier sequence: there is a unique base b >= 5 such that (n base b) contains the largest number of 4's.

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

Offset: 1

Author

Erich Friedman, Feb 03 2016

Keywords

• nonn
• base

Examples

			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.