0,1

If no base b gives any 4's then we take b=4.

a(n) > 4 for n >= 9 since 14 is n written in base n-4. - Chai Wah Wu, Feb 06 2016

Chai Wah Wu, Table of n, a(n) for n = 0..10000

Nathan Fox, First 10000 terms of A268236, A268237, A268238. Square brackets are used to separate the "digits" of A268236, since for n >= 66 these can be greater than 10.

Zach Weinersmith, Fouriest number, SMBC (Saturday Morning Breakfast Cereal) column, Feb 01, 2013.

Cf. A268236 (Fouriest transform of n), A268238 (number of 4's).

Sequence in context: A165923 A228729 A174444 * A276866 A006264 A134994

Adjacent sequences: A268234 A268235 A268236 * A268238 A268239 A268240

nonn,base

Jake Baron, Patrick Devlin, Nathan Fox, and N. J. A. Sloane, Feb 06 2016

approved