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 A098910 Table(n,2) read by rows giving k and j such that Mersenne-prime(k) - Mersenne-prime(j) + 1 is prime. 0
 2, 1, 3, 1, 4, 3, 5, 3, 6, 3, 7, 3, 8, 7, 8, 6, 9, 3, 10, 3, 12, 9 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..22. EXAMPLE (2^3-1)-(2^2-1)+1 = 5 = Mersenne-prime(2)-Mersenne-prime(1)+1 k=2 j=1 for n=1 (2^5-1)-(2^2-1)+1 = 29 = Mersenne-prime(3)-Mersenne-prime(1)+1 k=3 j=1 for n=2 (2^7-1)-(2^5-1)+1 = 97 = Mersenne-prime(4)-Mersenne-prime(3)+1 k=4 j=3 for n=3 and 5,29,97 are primes CROSSREFS Sequence in context: A075388 A036445 A289187 * A291323 A290988 A165025 Adjacent sequences: A098907 A098908 A098909 * A098911 A098912 A098913 KEYWORD more,nonn,tabf AUTHOR Pierre CAMI, Oct 16 2004 STATUS approved

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Last modified May 31 13:08 EDT 2023. Contains 363066 sequences. (Running on oeis4.)