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Search: id:A062066
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| A062066 |
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a(1) = 2; a(n) is the smallest prime > a(n-1) such that a(n) + a(n-1) is a cube. |
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+0
3
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| 2, 727, 2017, 11807, 15193, 39679, 70913, 124199, 314777, 1090151, 1895833, 3017167, 4982833, 8841167, 10841833, 14570351, 17587081, 24557111, 26095889, 27061487, 32257513, 45051263, 46073737, 61776439, 72441289, 74756663, 82707337, 114430031, 157667761, 170841239
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,45
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EXAMPLE
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The next term after 727 is 2017 as 727 + 2017 = 2744 = 14^3.
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PROGRAM
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(PARI) iscube(x)= { f=factor(x)~; for(i=1, length(f), if (t=f[2, i]%3, return(0))); return(1); } { a=2; for (n=1, 45, a1=a; if (n>1, until (iscube(a + a1), a=nextprime(a + 1))); write("b062066.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 31 2009]
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CROSSREFS
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Cf. A062064.
Sequence in context: A156008 A103169 A082438 this_sequence A082621 A053600 A090275
Adjacent sequences: A062063 A062064 A062065 this_sequence A062067 A062068 A062069
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jun 12 2001
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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), Jun 21 2001
Further terms from Philip Sung (phil(AT)main.nu), Sep 11 2001
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