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.

A115899 Numbers k such that phi(k) + prime(k) is a palindrome.

Original entry on oeis.org

1, 2, 3, 4, 10, 15, 27, 30, 38, 39, 61, 62, 63, 64, 70, 72, 87, 96, 109, 123, 126, 137, 148, 153, 156, 202, 269, 286, 508, 716, 889, 1019, 1037, 1082, 1142, 1162, 1179, 1199, 1267, 1312, 1391, 1399, 1405, 1448, 1491, 1672, 1705, 1744, 1909, 1980
Offset: 1

Views

Author

Giovanni Resta, Feb 06 2006

Keywords

Examples

			phi(1448) + prime(1448) = 720 + 12101 = 12821.
		

Crossrefs

Programs

  • Mathematica
    Select[Range[2000],PalindromeQ[EulerPhi[#]+Prime[#]]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Mar 30 2018 *)