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Search: id:A063176
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| A063176 |
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Composites for which the row of the prime-composite array (A063173) includes the leftmost element of both a zero-only antidiagonal and a zero-only diagonal(A067681). |
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+0
5
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| 15, 21, 51, 99, 249, 309, 339, 441, 615, 1065, 1071, 1275, 1311, 1461, 1665, 1719, 1935, 2445, 2451, 2499, 2511, 2781, 2829, 2949, 3015, 3129, 3435, 3759, 3789, 3795, 3819, 3939, 4161, 4221, 4761, 4809, 5709, 5721, 6291, 6555, 6699, 6855, 6921, 7071
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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N. Fernandez, The prime-composite array, B(m,n) and the Borve conjectures
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EXAMPLE
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The 12th composite is 21. In the prime-composite array (A063173), all of the elements in the antidiagonal containing T(12,1) are 0 and so are all the elements of the diagonal containing T(12,1). So 21 is in the sequence.
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CROSSREFS
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Cf. A063173, A063174, A063175, A067681.
Sequence in context: A063175 A129752 A015831 this_sequence A083372 A119101 A084931
Adjacent sequences: A063173 A063174 A063175 this_sequence A063177 A063178 A063179
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KEYWORD
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nonn
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AUTHOR
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N. Fernandez (primeness(AT)borve.org), Jul 09 2001
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EXTENSIONS
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Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Feb 07 2002
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