A098784 - OEIS

A098784

Smallest number not occurring earlier such that the concatenation of the numbers has the property that the first two digits sum to 10, the next two to 10, the next two to 10, the next two to 10, etc.

%I #2 Mar 31 2012 13:46:50

%S 1,9,2,8,3,7,4,6,5,51,91,92,81,93,71,94,61,95,52,82,83,72,84,62,85,53,

%T 73,74,63,75,54,64,65,55,56,41,96,42,86,43,76,44,66,45,57,31,97,32,87,

%U 33,77,34,67,35,58,21,98,22,88,23,78,24,68,25,59,11,99,12,89,13,79,14

%N Smallest number not occurring earlier such that the concatenation of the numbers has the property that the first two digits sum to 10, the next two to 10, the next two to 10, the next two to 10, etc.

%K base,easy,nonn

%O 1,2

%A _Eric Angelini_, Oct 04 2004