OFFSET
1,1
COMMENTS
Subsequence of A263106.
LINKS
Zak Seidov, Table of n, a(n) for n = 1..28070 (all terms up to 10^6)
EXAMPLE
Permute the digits of 15 = 3 * 5 to get 51 = 3 * 17.
Permute the digits of 26 = 2 * 13 to get 62 = 2 * 31.
Permute the digits of 122 = 2 * 61 to get 221 = 13 * 17.
Permute the digits of 129 = 3 * 43 to get 291 = 3 * 97.
MATHEMATICA
Select[Range[4, 1000000], 2 == PrimeOmega[#] == PrimeOmega[fd = FromDigits[RotateLeft[IntegerDigits[#]]]] && fd > # &] (* for b-file *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Zak Seidov, Oct 09 2015
STATUS
approved