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A059787 Distance between 2*(nth prime) and next prime. 9
1, 1, 1, 3, 1, 3, 3, 3, 1, 1, 5, 5, 1, 3, 3, 1, 9, 5, 3, 7, 3, 5, 1, 1, 3, 9, 5, 9, 5, 1, 3, 1, 3, 3, 9, 5, 3, 5, 3, 1, 1, 5, 1, 3, 3, 3, 9, 3, 3, 3, 1, 1, 5, 1, 7, 15, 3, 5, 3, 1, 3, 1, 3, 9, 5, 7, 11, 3, 7, 3, 3, 1, 5, 5, 3, 3, 9, 3, 7, 3, 1, 11, 1, 11, 3, 1, 9, 5, 7, 3, 3, 9, 3, 1, 11, 3, 1, 7, 3, 5, 3, 3 (list; graph; refs; listen; history; internal format)
OFFSET

1,4

EXAMPLE

If a(n)=1 then Prime[n] is Sophie Germain prime.

MAPLE

with(numtheory): [seq(nextprime(2*ithprime(k))-2*ithprime(k), k=1..256)];

CROSSREFS

A005385, A005384.

Sequence in context: A110629 A119979 A143149 * A081325 A132680 A105595

Adjacent sequences:  A059784 A059785 A059786 * A059788 A059789 A059790

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Feb 22 2001

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Last modified February 14 22:53 EST 2012. Contains 205685 sequences.