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Search: id:A143793
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| A143793 |
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Averages of twin primes of the form : i^2+j^2, as sum of two squres. |
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1
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| 180, 522, 810, 1620, 1872, 2088, 2340, 3258, 3330, 4050, 4338, 4932, 5652, 5850, 6570, 6660, 6948, 7488, 8010, 8388, 8820, 9000, 10530, 10890, 11700, 12240, 14562, 15138, 16362, 16452, 16650, 17658, 17748, 19080, 19890, 19962, 20232, 20772
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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180=6^2+12^2, 179 and 181 twin primes, 522=9^2+21^2, 521 and 523 twin primes.
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MATHEMATICA
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lst={}; For[i=1, i<=256, For[j=i+1, j<=i+256, c=i^2+j^2; If[PrimeQ[c-1]&&PrimeQ[c+1], AppendTo[lst, c]]; j++ ]; i++ ]; Take[Union[lst], 80]
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CROSSREFS
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Sequence in context: A015233 A154361 A004532 this_sequence A032774 A032776 A081380
Adjacent sequences: A143790 A143791 A143792 this_sequence A143794 A143795 A143796
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 01 2008
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