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Search: id:A008585
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| 0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, 96, 99, 102, 105, 108, 111, 114, 117, 120, 123, 126, 129, 132, 135, 138, 141, 144
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OFFSET
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0,2
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COMMENT
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If n != 1 and n^2+2 is prime then n is a member of this sequence. - Cino Hilliard (hillcino368(AT)hotmail.com), Mar 19 2007
Multiples of 3. Positive members of this sequence are the third transversal numbers (or 3-transversal numbers): Numbers of the 3rd column of positive numbers in the square array of nonnegative and polygonal numbers A139600. Also, numbers of the 3rd column in the square array A057145. - Omar E. Pol (info(AT)polprimos.com), May 02 2008
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LINKS
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A. S. Fraenkel, New games related to old and new sequences, INTEGERS, Electronic J. of Combinatorial Number Theory, Vol. 4, Paper G6, 2004.
INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 315
Tanya Khovanova, Recursive Sequences
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CROSSREFS
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Cf. A016957, A057145, A139600, A139606.
Sequence in context: A091780 A119888 A003252 this_sequence A031193 A008486 A036686
Adjacent sequences: A008582 A008583 A008584 this_sequence A008586 A008587 A008588
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KEYWORD
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nonn
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AUTHOR
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njas
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