A177856 Numbers m such that m*reversal(m)+1 is a palindrome.

1, 2, 10, 13, 14, 23, 31, 32, 40, 41, 100, 1000, 10000, 24000, 42000, 100000, 318317, 713813, 1000000, 10000000, 43029128, 82192034, 100000000, 1000000000, 3632590347, 7430952363, 10000000000, 100000000000, 259218138145, 541831812952, 1000000000000, 10000000000000

Offset

1,2

Links

Table of n, a(n) for n=1..32.

Carlos Rivera,P*R(P)+1 = Palprime

Mathematica

rev[n_] := FromDigits[Reverse[IntegerDigits[n]]]; isPal[n_] := n == rev[n]; t = {}; Do[If[isPal[n*rev[n] + 1], AppendTo[t, n]], {n, 10^6}]; t (* T. D. Noe, Mar 15 2012 *)

Crossrefs

Cf. A158997, A158999.

Sequence in context: A368159 A189079 A045218 * A343476 A343477 A296220

Adjacent sequences: A177853 A177854 A177855 * A177857 A177858 A177859

Keyword

nonn,base

Author

Franklin T. Adams-Watters, May 14 2010

Extensions

Two missing terms added by Lars Blomberg, Mar 15 2012

a(29)-a(32) from Giovanni Resta, Sep 01 2018

Status

approved