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

0,1

Links

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

Formula

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

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

Example

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

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 *)

Prog

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

Crossrefs

Cf. A000040, A004086, A056964.

Sequence in context: A049632 A216732 A276983 * A274522 A000066 A266730

Adjacent sequences: A061224 A061225 A061226 * A061228 A061229 A061230

Keyword

nonn,base,look

Author

Amarnath Murthy, Apr 22 2001

Extensions

More terms from Patrick De Geest, Jun 04 2001

Status

approved