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A085873
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a(1) = 2; a(n)= smallest prime of the form k*a(n-1) + 1 where k itself is a multiple of n.
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2
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2, 5, 31, 373, 22381, 134287, 3760037, 481284737, 25989375799, 6237450191761, 411671712656227, 64220787174371413, 73468580527480896473, 1028560127384732550623, 185140822929251859112141
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| a(2)= 5 = 2*2 + 1, a(3) = 6*5 + 1, a(4) = 12*31 + 1; 2,6 and 12 are respectively multiples of 2, 3 and 4.
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CROSSREFS
| Sequence in context: A097396 A056788 A091859 * A051048 A163852 A051399
Adjacent sequences: A085870 A085871 A085872 * A085874 A085875 A085876
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KEYWORD
| nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 07 2003
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EXTENSIONS
| More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Jul 08 2003
Corrected by T. D. Noe (noe(AT)sspectra.com), Nov 15 2006
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