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Search: id:A096160
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| A096160 |
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Numbers whose proper divisors can be arranged in such a way that all sums of adjacent pairs are primes. |
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+0
2
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| 4, 6, 8, 10, 12, 22, 30, 34, 58, 82, 118, 142, 202, 214, 274, 298, 358, 382, 394, 454, 478, 538, 562, 622, 694, 838, 862, 922, 1038, 1042, 1138, 1198, 1234, 1282, 1318, 1618, 1642, 1654, 1714, 1762, 2038, 2062, 2098, 2122, 2182, 2302, 2458, 2554, 2578, 2602
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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A096158(a(n)) > 0; subsequence of A096157.
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EXAMPLE
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Proper divisors of 30 are {1,2,3,5,6,10,15}: [3,10,1,6,5,2,15] -> (3+10,10+1,1+6,6+5,5+2,2+15) = (13,11,7,11,7,17): therefore 12 is a term.
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CROSSREFS
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Sequence in context: A131984 A131694 A053012 this_sequence A073669 A073670 A090169
Adjacent sequences: A096157 A096158 A096159 this_sequence A096161 A096162 A096163
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KEYWORD
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nonn
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AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 18 2004
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EXTENSIONS
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More terms from Ryan Propper (rpropper(AT)stanford.edu), Jul 22 2005
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