Search: id:A154685
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%I A154685
%S A154685 8,11,16,14,21,28,17,26,35,44,20,31,42,53,64,23,36,49,62,75,88,26,41,56,
%T A154685 71,86,101,116,29,46,63,80,97,114,131,148,32,51,70,89,108,127,146,165,
%U A154685 184,35,56,77,98,119,140,161,182,203,224
%N A154685 Triangle read by rows where T(m,n)=2mn+m+n+4
%C A154685 The terms form a subset of A153039 because 2*T(m,n)-7=(2n+1)(2m+1) are 
               not prime.
%e A154685 Triangle begins:
%e A154685 8;
%e A154685 11, 16;
%e A154685 14, 21, 28;
%e A154685 17, 26, 35, 44;
%e A154685 20, 31, 42, 53, 64;
%e A154685 23, 36, 49, 62, 75, 88;
%e A154685 26, 41, 56, 71, 86, 101, 116;
%e A154685 29, 46, 63, 80, 97, 114, 131, 148;
%e A154685 32, 51, 70, 89, 108, 127, 146, 165, 184;
%e A154685 35, 56, 77, 98, 119, 140, 161, 182, 203, 224;
%Y A154685 Cf. A153039, A089192
%Y A154685 Row sums: A151675. - N. J. A. Sloane, May 31 2009
%Y A154685 Sequence in context: A032423 A063724 A167499 this_sequence A068591 A065348 
               A155717
%Y A154685 Adjacent sequences: A154682 A154683 A154684 this_sequence A154686 A154687 
               A154688
%K A154685 nonn,tabl
%O A154685 1,1
%A A154685 Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 18 2009
%E A154685 Clarified comment. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 
               24 2009

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