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A112231 Repeat each prime in the sequence of natural numbers. 2
1, 2, 2, 3, 3, 4, 5, 5, 6, 7, 7, 8, 9, 10, 11, 11, 12, 13, 13, 14, 15, 16, 17, 17, 18, 19, 19, 20, 21, 22, 23, 23, 24, 25, 26, 27, 28, 29, 29, 30, 31, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 41, 42, 43, 43, 44, 45, 46, 47, 47, 48, 49, 50, 51, 52, 53, 53, 54, 55, 56, 57, 58 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A112233(n) - A112232(n);

a(n + A000040(n) - 1) = A000040(n),

a(n + A000040(n)) = A000040(n),

a(n + A000040(n) + 1) = A000040(n) + 1.

LINKS

Table of n, a(n) for n=1..74.

MATHEMATICA

Table[If[PrimeQ[n], {n, n}, n], {n, 70}]//Flatten (* Harvey P. Dale, Aug 12 2019 *)

CROSSREFS

Cf. A109763.

Sequence in context: A168581 A024699 A083479 * A334742 A213856 A173329

Adjacent sequences:  A112228 A112229 A112230 * A112232 A112233 A112234

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Aug 29 2005

STATUS

approved

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Last modified May 31 19:11 EDT 2020. Contains 334748 sequences. (Running on oeis4.)