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A115894 Numbers n such that phi(n) times the n-th prime is a palindrome. 1
1, 2, 5, 16, 534, 7412, 17280, 146533, 633932, 1424705, 5879645 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

phi(17280)*p(17280)=4608*191461=882252288.

MATHEMATICA

pppQ[n_]:=Module[{c=IntegerDigits[EulerPhi[n]Prime[n]]}, c == Reverse[c]]; Select[Range[6000000], pppQ] (* Harvey P. Dale, Aug 01 2012 *)

CROSSREFS

Cf. A084122, A115891, A115893.

Sequence in context: A327062 A306020 A037075 * A033835 A178198 A005529

Adjacent sequences:  A115891 A115892 A115893 * A115895 A115896 A115897

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 06 2006

STATUS

approved

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Last modified November 15 05:50 EST 2019. Contains 329144 sequences. (Running on oeis4.)