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A167843
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Obtuse-angled primes.
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4
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113, 127, 137, 139, 149, 157, 167, 179, 199, 211, 223
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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Primes in A135603.
Primes whose structure of digits represent an obtuse angle. The vertex is an internal digit. In the graphic representation the points are connected by imaginary line segments from left to right.
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LINKS
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Table of n, a(n) for n=1..11.
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CROSSREFS
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Cf. A134811, A134951, A134971, A135603, A167841, A167842, A167844, A167845, A167846, A167853.
Sequence in context: A242557 A214503 A054033 * A159466 A284598 A060591
Adjacent sequences: A167840 A167841 A167842 * A167844 A167845 A167846
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KEYWORD
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base,more,nonn
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AUTHOR
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Omar E. Pol, Nov 13 2009
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STATUS
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approved
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