Search: id:A085804 Results 1-1 of 1 results found. %I A085804 %S A085804 0,0,6,6,98,8,885,545,4294,1,542971,567942,4985950,34463095,817539359, %T A085804 3335212865,1825278551,60542888969,351980024812,6758401,13316726728064, %U A085804 355067132000559,10940544943498235,100371505302529555,98630474467606263 %N A085804 Least k such that n^n + k is a palindrome. %t A085804 NextPalindrome[n_] := Block[{l = Floor[Log[10, n] + 1], idn = IntegerDigits[n]}, If[ Union[ idn] == {9}, Return[n + 2], If[l < 2, Return[n + 1], If[ FromDigits[ Reverse[ Take[idn, Ceiling[l/2]]]] FromDigits[ Take[idn, -Ceiling[l/2]]], FromDigits[ Join[ Take[idn, Ceiling[l/2]], Reverse[ Take[idn, Floor[l/2]]]]], idfhn = FromDigits[ Take[idn, Ceiling[l/ 2]]] + 1; idp = FromDigits[ Join[ IntegerDigits[ idfhn], Drop[ Reverse[ IntegerDigits[ idfhn]], Mod[l, 2]]]]]]]]; f[n_] := Block[{}, If[ FromDigits[ Reverse[ IntegerDigits[n^n]]] == n^n, 0, NextPalindrome[n^n] - n^n]]; %Y A085804 Sequence in context: A078290 A065239 A146892 this_sequence A012125 A123190 A165641 %Y A085804 Adjacent sequences: A085801 A085802 A085803 this_sequence A085805 A085806 A085807 %K A085804 base,nonn %O A085804 1,3 %A A085804 Jason Earls (zevi_35711(AT)yahoo.com), Jul 24 2003 %E A085804 Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 26 2003 Search completed in 0.001 seconds