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A144309 a(n) = indices of smallest prime such that GAP to next prime not less than 2*n +0
1
2, 4, 9, 24, 30, 30, 30, 99, 99, 154, 189, 217, 217, 217, 217, 217, 217, 1183, 1831, 1831, 1831, 1831, 2225, 2225, 2225, 2225, 3385, 3385, 3385, 3385, 3385, 3385, 3385, 3385, 3385, 3385, 14357, 14357, 14357, 14357, 14357, 14357, 14357, 30802, 30802, 30802 (list; graph; listen)
OFFSET

1,1

MATHEMATICA

a = {}; Do[n = 1; While[(Prime[n + 1] - Prime[n]) < 2 k, n++ ]; AppendTo[a, n], {k, 1, 75}]; a

CROSSREFS

For indices of smallest prime such that GAP to next prime is exactly equal to 2*n see A000230. For records in this sequence see A005669

Sequence in context: A113997 A125789 A058731 this_sequence A080376 A005669 A038664

Adjacent sequences: A144306 A144307 A144308 this_sequence A144310 A144311 A144312

KEYWORD

nonn

AUTHOR

Artur Jasinski (grafix(AT)csl.pl), Sep 17 2008

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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