A061227 a(n) = p + R(p) where R(p) is the digit reversal of n-th prime p.

4, 6, 10, 14, 22, 44, 88, 110, 55, 121, 44, 110, 55, 77, 121, 88, 154, 77, 143, 88, 110, 176, 121, 187, 176, 202, 404, 808, 1010, 424, 848, 262, 868, 1070, 1090, 302, 908, 524, 928, 544, 1150, 362, 382, 584, 988, 1190, 323, 545, 949, 1151, 565, 1171, 383

Offset: 0

Author

Amarnath Murthy, Apr 22 2001

Keywords

• nonn
• base
• look

Examples

			a(4) = 14 = 7 + 7, 7 is the fourth prime; a(8) = 110 = 19 + 91, 19 is the eighth prime.
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A000040, A004086, A056964.

Programs

Haskell

a061227 n = p + a004086 p  where p = a000040 n
-- Reinhard Zumkeller, Feb 04 2014

Maple

revdigs:= proc(n) local L,i;
  L:= convert(n,base,10);
  add(10^(nops(L)-j)*L[j],j=1..nops(L))
end proc:
seq(x+revdigs(x),x=select(isprime,[2,seq(i,i=3..1000,2); # Robert Israel, May 23 2016

Mathematica

#+FromDigits[Reverse[IntegerDigits[#]]]&/@Prime[Range[60]] (* Harvey P. Dale, Jul 13 2013 *)

Formula

a(n) = A000040(n) + A004087(n). - Reinhard Zumkeller, Feb 04 2014

a(n) = A056964(A000040(n)). - Robert Israel, May 23 2016

Extensions

More terms from Patrick De Geest, Jun 04 2001