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Search: id:A110970
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A110970 Squares of the form 2*prime(n) - prime(n+1). +0
2
1, 9, 25, 81, 225, 361, 441, 1089, 1225, 2025, 2601, 3249, 3721, 5041, 7569, 7921, 12321, 13689, 15129, 18225, 21609, 30625, 31329, 38809, 42025, 47961, 53361, 59049, 65025, 77841, 88209, 91809, 94249, 99225, 110889, 123201, 126025, 131769 (list; graph; listen)
OFFSET

1,2

MATHEMATICA

Union[Select[(2Prime[ # ] - Prime[ # + 1]) & /@ Range[13000], IntegerQ[Sqrt[ # ]] &]] (*Chandler*)

CROSSREFS

Cf. A110975.

Sequence in context: A036836 A125997 A166103 this_sequence A141583 A147413 A066137

Adjacent sequences: A110967 A110968 A110969 this_sequence A110971 A110972 A110973

KEYWORD

nonn

AUTHOR

Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Sep 27 2005

EXTENSIONS

Corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 07 2005

page 1

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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