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A046356
Odd numbers with only palindromic prime factors whose sum is palindromic (counted with multiplicity).
2
9, 15, 27, 45, 121, 495, 735, 875, 1331, 1701, 2025, 2101, 2121, 2525, 2751, 3171, 3275, 3775, 3801, 4525, 5445, 6573, 7413, 7825, 7833, 8043, 8085, 8595, 8767, 8825, 9325, 9575, 9625, 10201, 12005, 13231, 14641, 15251, 15267, 15897, 16527, 17161
OFFSET
0,1
EXAMPLE
8767 = 11 * 797 -> 11 + 797 = 808 and 808 is a palindrome.
MATHEMATICA
palQ[n_] := Reverse[x=IntegerDigits[n]] == x; Select[Range[9, 17170, 2], !PrimeQ[#] && And@@palQ/@Join[{Total[Times@@@(x=FactorInteger[#])]}, First/@x]&] (* Jayanta Basu, Jun 05 2013 *)
CROSSREFS
Sequence in context: A258813 A046353 A340095 * A248381 A060874 A147511
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Jun 15 1998
STATUS
approved