A105956 - OEIS

%I #2 Mar 31 2012 13:46:51

%S 1,11,21,22,111,222,231,333,1111,2121,2222,2323,2341,3333,4141,4343,

%T 4444,11111,22222,23451,33333,44444,55555,111111,212121,222222,231231,

%U 232323,234234,234561,252525,261261,333333,414141,434343

%N Integers are written in the form abcd...n where "a" means "At position a in this integer there is a digit b"; "b" means: "at position b there is a digit c"; "c" means: "at position c there is a digit d"; ... and "n" means: "at position n there is a digit a".

%e Integer 231 reads like this:

%e "At position 2 there is a digit 3" -- which is true;

%e "At position 3 there is a digit 1" -- which is true again;

%e "At position 1 there is a digit 2" -- which is also true.

%K base,easy,nonn

%O 1,2

%A _Eric Angelini_, Apr 28 2005; corrected May 03 2005