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Composites for which the row of the prime-composite array (A063173) includes the leftmost element of a zero-only antidiagonal.
4

%I #6 Mar 31 2012 14:39:52

%S 9,15,21,35,45,51,65,69,95,99,119,129,135,141,155,161,189,209,215,219,

%T 249,261,299,303,305,309,321,339,341,363,365,371,399,405,413,425,441,

%U 453,465,545,555,615,623,639,651,705,713,725,729,741,771,783,803,819

%N Composites for which the row of the prime-composite array (A063173) includes the leftmost element of a zero-only antidiagonal.

%H N. Fernandez, <a href="http://www.borve.org/primeness/pcarray.html">The prime-composite array, B(m,n) and the Borve conjectures</a>

%e The 8th composite is 15. In the prime-composite array (A063173), all of the elements in the antidiagonal containing T(8,1) are 0. So 15 is in the sequence.

%Y Cf. A063173, A063175, A063176.

%K nonn

%O 1,1

%A _Neil Fernandez_, Jul 09 2001

%E Edited and extended by _Robert G. Wilson v_, Feb 07 2002