A167729 - OEIS

%I #6 Jun 02 2025 02:10:57

%S 12167,19683,24389,35937,59319,68921,456533,531441,658503,704969,

%T 970299,1685159,5545233,8869743,13312053,16974593,18191447,20346417,

%U 21717639,26730899,27818127,30080231,33076161,41781923,45499293,56181887

%N Cubes that become prime numbers when prefixed with a 5.

%H Harvey P. Dale, <a href="/A167729/b167729.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Range[400]^3,PrimeQ[FromDigits[Join[{5},IntegerDigits[#]]]]&] (* _Harvey P. Dale_, Jun 14 2013 *)

%K base,nonn

%O 1,1

%A _Claudio Meller_, Nov 10 2009

%E Definition clarified by _Harvey P. Dale_, Jun 14 2013