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Search: id:A090776
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| A090776 |
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30*a(n) is the gap between sexy prime triples in the n-th sexy prime triple triplet whose initial term is 7. |
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+0
1
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| 12, 24, 55, 62, 90, 262, 1090, 1245, 1459, 2057, 3043, 3296, 7390, 11625, 13961, 26423, 27557, 29833, 48809, 55711, 68794, 70180, 72554, 78025, 84654, 108590, 112321, 117995, 147101, 160730, 176889, 180829, 184182, 203586, 204116, 217587
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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The nine terms in any sexy prime triple triplet {{a, b, c}, {d, e, f}, {g, h, i}} may be arranged to form a 3 X 3 magic square [ h a f / c e g / d i b ].
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EXAMPLE
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a(2)=24 identifies the second sexy prime triple triplet whose initial term is 7: {{7, 13, 19}, {7+30*24, 13+30*24, 19+30*24}, {7+2*30*24, 13+2*30*24, 19+2*30*24}} which is equal to {{7, 13, 19}, {727, 733, 739}, {1447, 1453, 1459}}.
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CROSSREFS
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Cf. A023201, A046117.
Sequence in context: A102067 A081808 A080495 this_sequence A123980 A097704 A098585
Adjacent sequences: A090773 A090774 A090775 this_sequence A090777 A090778 A090779
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KEYWORD
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nonn
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AUTHOR
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Ray G. Opao (1260(AT)email.com), Feb 08 2004
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