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A049847 a(n) = (2*n + 1 - prevprime(2*n+1))/2. 5
1, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 2, 3, 1, 1, 2, 3, 1, 2, 1, 1, 2, 1, 2, 3, 1, 2, 3, 1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 1, 2, 1, 2, 3, 1, 2, 3, 4, 1, 2, 1, 1, 2, 1, 1, 2, 1, 2, 3, 4, 5, 6, 7, 1, 2, 1, 2, 3, 1, 1, 2, 3, 4, 5, 1, 1, 2, 3, 1, 2, 3, 1, 2, 1, 2, 3, 1, 2, 3, 1, 1, 2, 3, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,4
LINKS
MATHEMATICA
Table[(2n+1-NextPrime[2n+1, -1])/2, {n, 2, 100}] (* Harvey P. Dale, Jul 25 2015 *)
CROSSREFS
Sequence in context: A369377 A091304 A340101 * A255274 A025431 A161070
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified April 15 05:45 EDT 2024. Contains 371667 sequences. (Running on oeis4.)