A084123 Palindromic numbers which are equal to a number n multiplied by the n-th prime.

2, 6, 55, 444, 848, 122555221, 161131161, 5729689869275, 7587952597857, 35757255275753, 182196497222794691281

Offset: 1

Author

Giovanni Resta, May 14 2003

Keywords

• base
• nonn

Comments

a(12) > 4.3*10^26. [Giovanni Resta, Jun 28 2013]

Examples

			The palindrome 161131161 is in the sequence since 39119 is the 4119th prime and 4199*39119 = 161131161.
		

Crossrefs

Cf. A084121, A084122.

Programs

Mathematica

palQ[n_]:=FromDigits[Reverse[IntegerDigits[n]]]==n; t={}; Do[If[palQ[x=n*Prime[n]],AppendTo[t,x]],{n,15*10^5}]; t (* Jayanta Basu, May 11 2013 *)