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A048848 a(n) = prime(phi(n)). 3
2, 2, 3, 3, 7, 3, 13, 7, 13, 7, 29, 7, 37, 13, 19, 19, 53, 13, 61, 19, 37, 29, 79, 19, 71, 37, 61, 37, 107, 19, 113, 53, 71, 53, 89, 37, 151, 61, 89, 53, 173, 37, 181, 71, 89, 79, 199, 53, 181, 71, 131, 89, 239, 61, 173, 89, 151, 107, 271, 53, 281 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A000040(A000010(n)).

MAPLE

with(numtheory); [ seq(ithprime(phi(i)), i=1..80) ];

PROG

(PARI) A048848(n) = prime(eulerphi(n)); \\ Antti Karttunen, Dec 05 2017

CROSSREFS

Cf. A000010, A000040, A048849.

Sequence in context: A146157 A238363 A255254 * A323256 A192495 A162223

Adjacent sequences:  A048845 A048846 A048847 * A048849 A048850 A048851

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Offset corrected by Antti Karttunen, Dec 05 2017

STATUS

approved

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Last modified February 26 05:18 EST 2020. Contains 332276 sequences. (Running on oeis4.)