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A171562 Numbers k such that the k-th non-single or nonisolated number is prime. 0
1, 6, 8, 10, 11, 13, 15, 16, 17, 18, 21, 22, 23, 26, 27, 28, 29, 33, 34, 36, 38, 39, 40, 42, 44, 45, 47, 48, 49, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 63, 64, 65, 66, 68, 69, 70, 71, 72, 73, 74, 76, 77, 78, 79, 81, 82, 83, 85, 86, 88, 90, 91, 93, 94, 95, 96, 97, 98, 99, 100 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
MAPLE
A167706 := proc(n) if n = 1 then 2; else for a from procname(n-1)+1 do if isA007510(a) or isA014574(a) then return a; end if; end do; end if; end proc:
for n from 1 to 110 do p := A167706(n) ; if isprime(p) then printf("%d, ", n) : end if; end do: # R. J. Mathar, May 23 2010
CROSSREFS
Cf. A000040 (the prime numbers), A167706 (the single or isolated numbers).
Sequence in context: A315849 A138890 A189082 * A018221 A071278 A079772
KEYWORD
nonn
AUTHOR
EXTENSIONS
Corrected (20 replaced with 18, 25 replaced with 23, 32 replaced with 29, etc.) by R. J. Mathar, May 23 2010
STATUS
approved

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Last modified March 28 03:28 EDT 2024. Contains 371235 sequences. (Running on oeis4.)