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 A338363 a(n) = n + pi(n) - pi(floor(n/2)), where pi = A000720. 1
 1, 3, 5, 5, 7, 7, 9, 10, 11, 11, 13, 14, 16, 16, 17, 18, 20, 21, 23, 24, 25, 25, 27, 28, 29, 29, 30, 31, 33, 34, 36, 37, 38, 38, 39, 40, 42, 42, 43, 44, 46, 47, 49, 50, 51, 51, 53, 54, 55, 56, 57, 58, 60, 61, 62, 63, 64, 64, 66, 67, 69, 69, 70, 71, 72, 73, 75, 76, 77, 78, 80, 81 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..72. FORMULA a(n) = n + A056171(n). - Alois P. Heinz, Nov 04 2020 PROG (PARI) a(n) = n + primepi(n) - primepi(n\2); \\ Michel Marcus, Nov 04 2020 CROSSREFS Cf. A000720, A056171, A095117, A282029, A283312, A338362. Sequence in context: A279944 A309424 A079886 * A346563 A087243 A112276 Adjacent sequences: A338360 A338361 A338362 * A338364 A338365 A338366 KEYWORD nonn AUTHOR N. J. A. Sloane, Nov 04 2020 STATUS approved

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Last modified May 30 12:57 EDT 2023. Contains 363050 sequences. (Running on oeis4.)