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A070163 Primes arising in A070162(n). 0
3, 3, 2, 5, 7, 7, 7, 11, 11, 11, 13, 17, 23, 19, 23, 29, 23, 23, 31, 29, 31, 29, 43, 31, 31, 47, 37, 53, 47, 41, 59, 43, 47, 47, 47, 59, 53, 71, 59, 59, 61, 89, 67, 71, 71, 73, 109, 79, 107, 79, 107, 83, 83, 89, 131, 109, 127, 97, 137, 101, 139, 103, 107, 107, 109, 139 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..66.

FORMULA

a[n]=A070162(n)-A000010(A070162(n))-1=A051953(A070162(n))-1

MATHEMATICA

Do[s=n-EulerPhi[n]-1; If[PrimeQ[s], Print[s]], n, 1, 10000]

CROSSREFS

Cf. A000010, A051953, A070162.

Sequence in context: A143050 A214919 A290599 * A083343 A292527 A186111

Adjacent sequences:  A070160 A070161 A070162 * A070164 A070165 A070166

KEYWORD

nonn

AUTHOR

Labos Elemer, Apr 26 2002

STATUS

approved

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Last modified October 16 01:14 EDT 2019. Contains 328038 sequences. (Running on oeis4.)