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Search: id:A098910
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| A098910 |
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Table(n,2) read by rows giving k and j such that Mersenne-prime(k) - Mersenne-prime(j) + 1 is prime. |
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+0
1
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| 2, 1, 3, 1, 4, 3, 5, 3, 6, 3, 7, 3, 8, 7, 8, 6, 9, 3, 10, 3, 12, 9
(list; table; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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(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
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CROSSREFS
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Sequence in context: A116512 A075388 A036445 this_sequence A082904 A034868 A050382
Adjacent sequences: A098907 A098908 A098909 this_sequence A098911 A098912 A098913
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KEYWORD
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more,nonn,tabl
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AUTHOR
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Pierre CAMI (pierrecami(AT)tele2.fr), Oct 16 2004
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