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Search: id:A075231
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| A075231 |
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Numbers n such that n^8 is an interprime = average of two successive primes. |
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10
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| 12, 111, 116, 175, 183, 205, 246, 305, 313, 406, 438, 593, 594, 620, 696, 714, 788, 824, 844, 969, 1014, 1023, 1061, 1080, 1153, 1176, 1204, 1288, 1367, 1456, 1470, 1515, 1533, 1538, 1572, 1626, 1659, 1689, 1692, 1695, 1734, 1759, 1788, 1860, 1928
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Interprimes are in A024675, even interprimes are in A072568, odd interprimes are in A072569 n^2 as interprimes are in A075190, n^3 as interprimes are in A075191, n^4 as interprimes are in A075192, n^5 as interprimes are in A075228, n^6 as interprimes are in A075229, n^7 as interprimes are in A075230, n^9 as interprimes are in A075232, n^10 as interprimes are in A075233, a(n) such that a(n)^n = smallest interprime (of the form a^n) are in A075234.
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EXAMPLE
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12 is a member because 12^8 = 429981696 is average of two successive primes 429981691 and 429981701.
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MAPLE
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s := 8: for n from 2 to 1000 do if prevprime(n^s)+nextprime(n^s)=2*n^s then print(n) else; fi; od;
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MATHEMATICA
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Select[ Range[2000], 2#^8 == PrevPrim[ #^8] + NextPrim[ #^8] &]
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CROSSREFS
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Cf. A024675, A072568, A072569, A075190-A075192, A075228-A075234.
Sequence in context: A037616 A048532 A049102 this_sequence A085773 A066042 A153597
Adjacent sequences: A075228 A075229 A075230 this_sequence A075232 A075233 A075234
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Sep 09 2002
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EXTENSIONS
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Edited by Robert G. Wilson v (rgwv(AT)rgwv.com) Sep 14 2002
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