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Search: id:A088037
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| A088037 |
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Smallest square k == 1 (mod some n-th power), k > 1. |
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+0
3
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| 4, 9, 9, 49, 225, 961, 3969, 16129, 65025, 261121, 1046529, 4190209, 16769025, 67092481, 268402689, 1073676289, 4294836225, 17179607041, 68718952449, 274876858369, 1099509530625, 4398042316801, 17592177655809
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OFFSET
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1,1
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COMMENT
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From a(2) onwards the n-th power that divides a(n) -1 is 2^n ===> Second term onwards same as A060867 i.e. a(n+1) = (2^n-1)^2.
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EXAMPLE
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a(6) = 961 and 960 = 64*15.
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CROSSREFS
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Cf. A060867.
Sequence in context: A081949 A091657 A156047 this_sequence A071768 A161913 A020673
Adjacent sequences: A088034 A088035 A088036 this_sequence A088038 A088039 A088040
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 19 2003
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EXTENSIONS
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More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 04 2003
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