1,1

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

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.

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

nonn,base

Erich Friedman, Feb 03 2016

approved