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 A135684 a(n)=11 if n is a prime number. Otherwise, a(n)=n. 1
 1, 11, 11, 4, 11, 6, 11, 8, 9, 10, 11, 12, 11, 14, 15, 16, 11, 18, 11, 20, 21, 22, 11, 24, 25, 26, 27, 28, 11, 30, 11, 32, 33, 34, 35, 36, 11, 38, 39, 40, 11, 42, 11, 44, 45, 46, 11, 48, 49, 50, 51, 52, 11, 54, 55, 56, 57, 58, 11 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Table[If[PrimeQ[n], 11, n], {n, 70}] (* Vincenzo Librandi, Feb 22 2013 *) PROG (MAGMA) [IsPrime(n) select 11 else n: n in [1..70]]; // Vincenzo Librandi, Feb 22 2013 CROSSREFS Cf. A000027; A000040; A135679; A135680; A014681; A014682; A014683; A014684; A014685; A014686; A014687; A014688; A014689; A014690; A135681; A135682; A135683. Sequence in context: A260589 A291367 A061186 * A220295 A300289 A321108 Adjacent sequences:  A135681 A135682 A135683 * A135685 A135686 A135687 KEYWORD nonn,easy AUTHOR Mohammad K. Azarian, Dec 01 2007 STATUS approved

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Last modified July 29 22:13 EDT 2021. Contains 346346 sequences. (Running on oeis4.)