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A067161 a(n) = prime(sigma(n)). 2
2, 5, 7, 17, 13, 37, 19, 47, 41, 61, 37, 107, 43, 89, 89, 127, 61, 167, 71, 181, 131, 151, 89, 281, 127, 181, 173, 263, 113, 359, 131, 307, 223, 251, 223, 467, 163, 281, 263, 463, 181, 503, 193, 433, 397, 359, 223, 683, 269, 487, 359, 521, 251, 659, 359, 659 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

Index entries for sequences related to sigma(n)

FORMULA

a(n) = A000040(A000203(n)).

a(A000040(n)) = A072677(n). - Michael B. Porter, Nov 18 2017

MATHEMATICA

Prime[DivisorSigma[1, Range[60]]] (* Harvey P. Dale, May 10 2013  *)

PROG

(PARI) A067161(n) = prime(sigma(n)); \\ Antti Karttunen, Nov 16 2017

CROSSREFS

Cf. A000040, A000203, A072677.

Sequence in context: A089727 A113514 A145674 * A281794 A193462 A306636

Adjacent sequences:  A067158 A067159 A067160 * A067162 A067163 A067164

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Feb 19 2002

STATUS

approved

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Last modified September 22 12:42 EDT 2019. Contains 327307 sequences. (Running on oeis4.)