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Search: id:A090891
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| A090891 |
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30*a(n) is the gap between sexy prime triplets in the n-th sexy prime triple triplet whose initial term is 17. |
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+0
1
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| 18, 21, 49, 130, 1383, 2660, 3245, 5730, 9569, 10735, 11018, 12054, 13528, 18249, 19222, 21483, 22029, 31665, 31899, 37804, 40576, 59322, 59353, 59966, 65020, 65972, 73843, 80938, 82716, 84445, 85365, 89866, 92586, 103639, 105158, 107149
(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)=21 identifies the second sexy prime triple triplet whose initial term is 17: {{17, 23, 29}, {17+30*21, 23+30*21, 29+30*21}, {17+2*30*21, 23+2*30*21, 29+2*30*21}} which is equal to {{17, 23, 29}, {647, 653, 659}, {1277, 1283, 1289}}.
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CROSSREFS
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Cf. A023201, A046117.
Sequence in context: A088341 A105145 A120416 this_sequence A121851 A049734 A096282
Adjacent sequences: A090888 A090889 A090890 this_sequence A090892 A090893 A090894
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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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