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A066985
Reflective numbers: k such that the decimal encoding of the prime factorization of k (A067599) is palindromic.
0
4, 11, 13, 17, 19, 27, 72, 199, 242, 529, 800, 841, 1151, 1171, 1181, 1303, 1352, 1373, 1469, 1747, 1777, 1787, 1922, 1949, 1979, 1999, 2321, 3125, 3362, 3421, 3887, 3993, 4069, 4096, 4232, 5389, 5766, 6272, 7442, 7961, 7969, 8921, 10021, 10082, 10469
OFFSET
1,1
EXAMPLE
The decimal encoding of the prime factorization 13^1 * 313^1 of 4069 is 1313131, which is palindromic. So 4069 is a term of the sequence.
MATHEMATICA
f[n_] := Flatten[IntegerDigits[FactorInteger[n]]]; Select[Range[2, 11000], f[ # ] == Reverse[f[ # ]] &]
CROSSREFS
Sequence in context: A285633 A266281 A154040 * A228003 A347561 A234903
KEYWORD
base,nonn
AUTHOR
Joseph L. Pe, Feb 01 2002
EXTENSIONS
Edited by Robert G. Wilson v, Feb 08 2002
Offset corrected by Mohammed Yaseen, Jul 17 2023
STATUS
approved