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A067354 Numbers n such that prime(n+2)-(n+2)*tau(n+2)=prime(n-2)-(n-2)*tau(n-2) where tau(n) is the number of divisors of n A000005(n). 0
3, 8, 30, 68, 277, 600, 1444, 2123, 3128, 3230, 3672, 3783, 4441, 5016, 5052, 5144, 5304, 5665, 6353, 6468, 6513, 6588, 6772, 6983, 7044, 7087, 8392, 8418, 8632, 8866, 9217, 9264, 9292, 9540, 9917, 9949, 10495, 11429, 11532, 13474, 14063, 15431 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

MATHEMATICA

Select[Range[3, 16000], Prime[#-2]-(#-2)DivisorSigma[0, #-2]==Prime[#+2]-(#+2)DivisorSigma[0, #+2]&] (* Harvey P. Dale, Dec 20 2015 *)

CROSSREFS

Cf. A000005.

Sequence in context: A289486 A245361 A247340 * A148877 A148878 A148879

Adjacent sequences:  A067351 A067352 A067353 * A067355 A067356 A067357

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, Feb 24 2002

STATUS

approved

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Last modified October 23 17:32 EDT 2019. Contains 328373 sequences. (Running on oeis4.)