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 A105575 Largest primes < numbers of the form 6k (duplicates removed). 2
 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; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE 11 is in the sequence because 11 is the largest prime < 12 = 6*2. MATHEMATICA PrevPrim[n_] := Block[{k = n - 1}, While[ !PrimeQ[k], k-- ]; k]; Union[ Table[ PrevPrim[6n], {n, 65}]] (* Robert G. Wilson v, May 21 2005 *) NextPrime[#, -1]&/@(6*Range[100])//Union (* Harvey P. Dale, Sep 23 2017 *) CROSSREFS Cf. A105399. Sequence in context: A070753 A038939 A314243 * A314244 A314245 A314246 Adjacent sequences:  A105572 A105573 A105574 * A105576 A105577 A105578 KEYWORD easy,nonn AUTHOR Giovanni Teofilatto, May 03 2005 EXTENSIONS Corrected and extended by Robert G. Wilson v, May 21 2005 Edited, corrected and extended by Ray Chandler, Oct 17 2006 STATUS approved

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Last modified April 16 12:45 EDT 2021. Contains 343037 sequences. (Running on oeis4.)