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A081385 Incorrect version of A006254 (or A111333). 0
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 16, 17, 18, 19, 20, 26, 27, 28, 29, 30, 36, 37, 38, 39, 40, 46, 47, 48, 49, 50, 51, 52, 53, 54, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Name was: Numbers just more than half-prime.

REFERENCES

M. J. Halm, More Sequences, Mpossibilities 83, 2003.

LINKS

Table of n, a(n) for n=1..44.

M. J. Halm, Sequences

FORMULA

a(n) = [p(n)/2 + 1/2].

EXAMPLE

a(11) = 16 because [(31)/2 + 1/2]=16.

PROG

(PARI) a(n) = ceil(prime(n)/2); \\ Michel Marcus, Aug 13 2013

CROSSREFS

Cf. A000040.

Sequence in context: A140335 A004839 A032993 * A097912 A265329 A032999

Adjacent sequences:  A081382 A081383 A081384 * A081386 A081387 A081388

KEYWORD

easy,nonn,dead

AUTHOR

Michael Joseph Halm, Apr 20 2003

STATUS

approved

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Last modified September 25 19:42 EDT 2020. Contains 337344 sequences. (Running on oeis4.)