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A061227 a(n) = p + R{p} where R{p} is the digit reversal of n-th prime p. 2
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 7 20:43 EST 2019. Contains 329849 sequences. (Running on oeis4.)