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Search: id:A090890
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| A090890 |
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30*a(n) is the gap between sexy prime triples in the n-th sexy prime triple triple whose initial term is 11. |
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+0
1
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| 291, 564, 742, 2639, 4319, 5278, 5408, 7431, 10119, 10413, 11085, 14056, 14672, 19002, 23492, 26737, 31962, 33912, 35308, 36743, 37870, 45602, 54348, 56693, 59353, 60211, 64397, 64509, 65391, 72562, 92617, 94609, 106309, 114552, 142160
(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 triple {{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)=564 identifies the second sexy prime triple triple whose initial term is 11: {{11, 17, 23}, {11+30*564, 17+30*564, 23+30*564}, {11+2*30*564, 17+2*30*564, 23+2*30*564}} which is equal to {{11, 17, 23}, {16931, 16937, 16943}, {33851, 33857, 33863}}.
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CROSSREFS
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Cf. A023201, A046117.
Sequence in context: A091740 A098250 A031515 this_sequence A123913 A031695 A158254
Adjacent sequences: A090887 A090888 A090889 this_sequence A090891 A090892 A090893
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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 16 2004
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