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Search: id:A105575
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| A105575 |
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Largest primes < numbers of the form 6k (duplicates removed). |
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+0
3
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| 5, 11, 17, 23, 29, 31, 41, 47, 53, 59, 61, 71, 73, 83, 89, 101, 107, 113, 131, 137, 139, 149, 151, 157, 167, 173, 179, 181, 191, 197, 199, 211, 227, 233, 239, 241, 251, 257, 263, 269, 271, 281, 283, 293, 311, 317, 331, 337, 347, 353, 359, 367, 373, 383, 389
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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11 is in the sequence because 11 is the largest prime < 12=6*2.
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MATHEMATICA
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PrevPrim[n_] := Block[{k = n - 1}, While[ !PrimeQ[k], k-- ]; k]; Union[ Table[ PrevPrim[6n], {n, 65}]] (from Robert G. Wilson v (rgwv(AT)rgwv.com), May 21 2005)
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CROSSREFS
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Cf. A105399.
Sequence in context: A031480 A070753 A038939 this_sequence A105644 A059538 A101328
Adjacent sequences: A105572 A105573 A105574 this_sequence A105576 A105577 A105578
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KEYWORD
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easy,nonn
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AUTHOR
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Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), May 03 2005
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EXTENSIONS
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Corrected and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), May 21 2005
Edited, corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 17 2006
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