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Search: id:A143798
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| A143798 |
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Twin prime numbers of the form : i^2+j^3, as sum of square and cube. |
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+0
1
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| 5, 17, 31, 43, 73, 101, 197, 241, 269, 283, 347, 521, 599, 811, 827, 829, 1019, 1049, 1051, 1153, 1289, 1787, 2089, 2143, 2341, 2689, 2731, 2969, 3257, 3259, 3391, 4051, 4093, 4129, 4159, 4217, 4481, 4721, 4931, 5881, 6361, 6793, 6959, 7759, 8009, 8233
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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31=2^2+3^3; 43=4^2+3^3.
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MATHEMATICA
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lst1={}; For[i=1, i<=60, For[j=1, j<=60, c=i^2+j^3; If[((PrimeQ[c]&&PrimeQ[c-2])||(PrimeQ[c]&&PrimeQ[c+2])), AppendTo[lst1, c]]; j++ ]; i++ ]; lst2=Take[Union[lst1], 80]
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CROSSREFS
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Sequence in context: A143103 A091851 A079292 this_sequence A031013 A031370 A147434
Adjacent sequences: A143795 A143796 A143797 this_sequence A143799 A143800 A143801
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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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