A081385 Incorrect version of A006254 (or A111333).

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

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

dead

Author

Michael Joseph Halm, Apr 20 2003

Status

approved