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.
%I A118715 #10 Feb 17 2024 02:47:19 %S A118715 0,1,4,8,9,10,18,23,40,46,52,61,63,72,80,90,94,100,121,144,148,163, %T A118715 169,180,215,230,342,343,400,423,441,460,484,487,520,521,522,526,610, %U A118715 612,630,652,675,676,691,720,800,821,900,925,927,940,961,982,1000,1042,1062 %N A118715 Numbers n such that the digital reversal of n is a perfect power (A001597). %e A118715 63 is a member of the sequence since its digital reversal, 36=6^2, is the ninth perfect power. %t A118715 fQ[n_] := Block[{rid = FromDigits@ Reverse@ IntegerDigits@n}, rid == 0 || rid == 1 || GCD @@ Last /@ FactorInteger@ rid > 1]; %t A118715 Select[ Range[0, 1088], fQ@# &] (* _Robert G. Wilson v_, May 22 2006 *) %Y A118715 Cf. A001597. %K A118715 base,easy,nonn,less %O A118715 1,3 %A A118715 _Giovanni Teofilatto_, May 21 2006 %E A118715 Edited and extended by _Robert G. Wilson v_, May 22 2006