cp's OEIS Frontend

A194188 Triangle read by rows in which row n lists the numbers k >= 0 such that n-k and n+k are both odd noncomposite numbers.

%I A194188 #7 Mar 30 2012 18:52:46
%S A194188 0,1,0,2,1,3,0,2,1,5,0,4,6,3,5,2,4,8,3,7,9,0,6,8,1,5,7,11,0,6,10,3,9,
%T A194188 2,4,8,14,3,13,15,0,6,12,14,1,5,11,13,0,12,18,3,9,17,2,8,10,16,20,9,
%U A194188 15,19,21,0,6,18,20,5,7,13,17,19,23,6,12,18,22,3,15,21,4,10,14,16,20,26,9,15,25,0,12,18,24,1,7,11,13,17,23,29
%N A194188 Triangle read by rows in which row n lists the numbers k >= 0 such that n-k and n+k are both odd noncomposite numbers.
%e A194188 Triangle begins;
%e A194188 0;
%e A194188 1;
%e A194188 0,2;
%e A194188 1,3;
%e A194188 0,2;
%e A194188 1,5;
%e A194188 0,4,6;
%e A194188 3,5;
%e A194188 2,4,8;
%e A194188 3,7,9;
%e A194188 0,6,8;
%e A194188 1,5,7,11;
%Y A194188 Cf. A006005(the odd noncomposite numbers), A027750
%K A194188 nonn,tabf
%O A194188 1,4
%A A194188 _Juri-Stepan Gerasimov_, Aug 18 2011
%E A194188 Corrected by R. J. Mathar Aug 27 2011