A166494 - OEIS

%I #5 Mar 30 2012 18:52:04

%S 3,8,5,5,12,12,7,7,7,16,16,16,9,9,9,9,20,20,20,20,11,11,11,11,11,24,

%T 24,24,24,24,13,13,13,13,13,13,28,28,28,28,28,28,15,15,15,15,15,15,15,

%U 32,32,32,32,32,32,32,17,17,17,17,17,17,17,17,36,36,36,36,36,36,36,36,19,19,19,19,19,19,19,19,19,40,40,40,40,40,40,40,40,40,21,21,21,21,21,21,21,21

%N Irregular triangle T(n,k) = greatest common divisor of n-th row terms of A143753.

%F T(n,k) = A022998(n+2).

%e 3;

%e 8;

%e 5,5;

%e 12,12;

%e 7,7,7;

%e 16,16,16;

%Y Cf. A166866.

%K nonn,tabf,easy

%O 1,1

%A _Paul Curtz_, Oct 15 2009