A099148 - OEIS

%I #4 Mar 31 2012 20:47:17

%S 2,3,8,9,14,15,20,39,77,98,99,138,158,164,177,200,399,492,614,998,999,

%T 1065,1383,1505,1598,1797,1859,1920,2000,2655,3077,3213,3762,3999,6707

%N Take a <= b such that f(a)+f(b)=concatenation of a and b, where f(k)=k(k+3)/2 (A000096). Sequence gives values of a.

%C For values of b, see A099149.

%Y Cf. A096032, A099149.

%K nonn,base

%O 1,1

%A _John W. Layman_, Sep 30 2004

%E Edited by _Charles R Greathouse IV_, Apr 23 2010