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A080262 Cunningham numbers: of the form a^b +- 1, where a, b >= 2. +0
1
3, 5, 7, 8, 9, 10, 15, 17, 24, 26, 28, 31, 33, 35, 37, 48, 50, 63, 65, 80, 82, 99, 101, 120, 122, 124, 126, 127, 129, 143, 145, 168, 170, 195, 197, 215, 217, 224, 226, 242, 244, 255, 257, 288, 290, 323, 325, 342, 344, 360, 362, 399, 401, 440, 442, 483, 485, 511 (list; graph; listen)
OFFSET

1,1

LINKS

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

EXAMPLE

26 = 3^3-1, 126 = 5^3+1 are Cunningham numbers.

CROSSREFS

Sequence in context: A020491 A047746 A111638 this_sequence A160238 A025050 A025051

Adjacent sequences: A080259 A080260 A080261 this_sequence A080263 A080264 A080265

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net), Feb 11 2003

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.


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