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A167480 a(n)= primepi(n) if n is prime, otherwise a(n)=prime(n). 4
2, 1, 2, 7, 3, 13, 4, 19, 23, 29, 5, 37, 6, 43, 47, 53, 7, 61, 8, 71, 73, 79, 9, 89, 97, 101, 103, 107, 10, 113, 11, 131, 137, 139, 149, 151, 12, 163, 167, 173, 13, 181, 14, 193, 197, 199, 15, 223, 227, 229, 233, 239, 16, 251, 257, 263, 269, 271, 17, 281, 18, 293, 307 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Table[If[PrimeQ[n], PrimePi[n], Prime[n]], {n, 1, 200}]
CROSSREFS
Cf. A068519 a(n)=n if n is prime otherwise a(n)=prime(n), A175027 a(n)=n if n is nonprime otherwise a(n)=primepi(n).
Sequence in context: A278710 A011241 A261879 * A241738 A021051 A113246
KEYWORD
nonn
AUTHOR
Zak Seidov, Nov 04 2009
STATUS
approved

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Last modified June 23 06:39 EDT 2024. Contains 373629 sequences. (Running on oeis4.)