| 5, 9, 14, 17, 23, 26, 30, 42, 49, 55, 56, 80, 77, 72, 85, 84, 89, 119, 102, 118, 137, 136, 143, 140, 149, 156, 174, 178, 188, 184, 194, 200, 195, 207, 219, 198, 228, 247, 261, 263, 245, 249, 279, 297, 289, 327, 306, 310, 325, 335, 321, 290, 356, 344, 425, 365
(list; graph; listen)
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OFFSET
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2,1
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COMMENT
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a(n) is the index of last occurrence of n in A014085. This sequence relies on a heuristic calculation and there is no proof that it is correct. Conjecture: There is no k that has only one prime between k^2 and (k+1)^2.
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REFERENCES
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P. Ribenboim, The Little Book of Big Primes. Springer-Verlag, 1991, p. 143.
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LINKS
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T. D. Noe, Table of n, a(n) for n=2..1000
Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics. Landau's Problems.
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EXAMPLE
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a(14)=77 because 14 is in sequence A014085 for the last time at item 77. There are 14 primes between 77^2 and 78^2.
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CROSSREFS
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Cf. A007491, A014085, A076957, A084596.
Sequence in context: A146135 A101116 A030772 this_sequence A130877 A140490 A079509
Adjacent sequences: A084594 A084595 A084596 this_sequence A084598 A084599 A084600
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KEYWORD
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nonn
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AUTHOR
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Harry J. Smith (hjsmithh(AT)sbcglobal.net), May 31 2003
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