A118895 Numbers n with property that both n and its digit reversal are perfect powers (i.e., in A001597).
1, 4, 8, 9, 100, 121, 144, 169, 343, 400, 441, 484, 676, 900, 961, 1000, 1089, 1331, 8000, 9801, 10000, 10201, 10404, 10609, 12100, 12321, 12544, 12769, 14400, 14641, 14884, 16900, 40000, 40401, 40804, 44100, 44521, 44944, 48400, 48841, 67600
Offset: 1
Examples
100 is in the sequence because 100 and 001 = 1 are both perfect powers; 44521 and 12544 are both in the sequence because both are perfect powers, 221^2 and 112^2.
Extensions
Edited by N. J. A. Sloane, Oct 11 2008
Comments