cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A084092 Prime power decimal palindromes.

Original entry on oeis.org

1, 2, 3, 4, 5, 7, 8, 9, 11, 101, 121, 131, 151, 181, 191, 313, 343, 353, 373, 383, 727, 757, 787, 797, 919, 929, 1331, 10201, 10301, 10501, 10601, 11311, 11411, 12421, 12721, 12821, 13331, 13831, 13931, 14341, 14641, 14741, 15451, 15551, 16061, 16361
Offset: 1

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Author

Reinhard Zumkeller, May 11 2003

Keywords

Examples

			121=A000961(42)=A002113(21), therefore 121 is a term;
131=A000961(46)=A002113(22), therefore 131 is a term.
		

Crossrefs

Intersection of A000961 and A002113, union of A002385 and A084093.

Programs

  • Mathematica
    Join[{1}, Select[Range[16370], Reverse[x = IntegerDigits[#]] == x && PrimePowerQ[#] &]] (* Jayanta Basu, Jun 24 2013 *)
    Join[{1},Select[Range[17000],PalindromeQ[#]&&PrimePowerQ[#]&]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Oct 07 2019 *)

Extensions

Corrected and extended by T. D. Noe, Oct 25 2006
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