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%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