A114880 a(n) is the largest base-3 string such that the n-th number coprime to 3 does not divide any substring of a(n).

1, 212, 2111, 22222, 21112, 222111222, 212121212, 22112121, 212221222212, 2221221221222, 222222222222222, 22222222222222222, 1121212211122121211, 2121212121212121212, 112221112211111121, 21111111111111111111

Offset

2,2

Links

Table of n, a(n) for n=2..17.

Example

a(3) = 212 (base three) because the 3rd number coprime to 4 is 4, and 4 does not divide any substring of a(3).

Crossrefs

Sequence in context: A204364 A235180 A353139 * A348831 A200433 A222950

Adjacent sequences: A114877 A114878 A114879 * A114881 A114882 A114883

Keyword

nonn,base

Author

Don Reble, Feb 20 2006

Status

approved