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 A096457 If n is prime replace n with the next prime. 1
 1, 3, 5, 4, 7, 6, 11, 8, 9, 10, 13, 12, 17, 14, 15, 16, 19, 18, 23, 20, 21, 22, 29, 24, 25, 26, 27, 28, 31, 30, 37, 32, 33, 34, 35, 36, 41, 38, 39, 40, 43, 42, 47, 44, 45, 46, 53, 48, 49, 50, 51, 52, 59, 54, 55, 56, 57, 58, 61, 60, 67, 62, 63, 64, 65, 66, 71, 68, 69, 70, 73, 72 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE For n = prime 7, nextprime(7+1) = 11 = a(7). MATHEMATICA Table[If[PrimeQ[n], NextPrime[n], n], {n, 80}] (* Harvey P. Dale, Jul 05 2019 *) PROG (PARI) f(n) = for(x=1, n, if(isprime(x), y=nextprime(x+1), y=x); print1(y", ")) CROSSREFS Sequence in context: A107431 A189827 A023859 * A277897 A082568 A242640 Adjacent sequences:  A096454 A096455 A096456 * A096458 A096459 A096460 KEYWORD nonn AUTHOR Cino Hilliard, Aug 11 2004 STATUS approved

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Last modified April 5 20:07 EDT 2020. Contains 333260 sequences. (Running on oeis4.)