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 A048614 Number of primes between successive pairs of twin primes. 13
 0, 0, 0, 1, 1, 2, 1, 4, 0, 3, 0, 4, 0, 0, 2, 1, 3, 1, 2, 3, 10, 0, 4, 7, 4, 3, 2, 1, 2, 18, 0, 0, 2, 2, 17, 0, 1, 0, 2, 6, 9, 3, 1, 1, 1, 8, 3, 2, 0, 15, 1, 4, 1, 1, 7, 7, 0, 4, 0, 4, 3, 4, 0, 1, 0, 1, 7, 2, 5, 1, 5, 18, 2, 5, 4, 3, 1, 5, 1, 18, 0, 12, 2, 8, 0, 1, 4, 2, 0, 0, 5, 0, 4, 1, 1, 1, 9, 10, 4, 2, 6 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,6 LINKS T. D. Noe, Table of n, a(n) for n=1..10000 FORMULA a(n) = A027833(n)-2 for n>1. - T. D. Noe, Feb 28 2007 EXAMPLE a(8)= 4 because between the 8th and 9th pairs of twins there are 4 primes: (71,73) 79 83 89 97 (101,103). MATHEMATICA t1=Select[Prime[Range[3, 542]], PrimeQ[#+2]&]; Prepend[Table[PrimePi[t1[[i+1]]]-PrimePi[t1[[i]]]-2, {i, 1, Length[t1]-1}], 0] (* Jayanta Basu, May 26 2013 *) CROSSREFS Cf. A001223, A027833. Sequence in context: A220504 A087569 A341509 * A001442 A226952 A158285 Adjacent sequences: A048611 A048612 A048613 * A048615 A048616 A048617 KEYWORD nonn,easy AUTHOR Den Roussel (DenRoussel(AT)webtv.net) EXTENSIONS Corrected and extended by Labos Elemer, Mar 23 2000 STATUS approved

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Last modified June 20 22:01 EDT 2024. Contains 373532 sequences. (Running on oeis4.)