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A226778 Numbers having no common divisor > 1 with their reversal in decimal representation (see A043537). 3
1, 10, 13, 14, 16, 17, 19, 23, 25, 29, 31, 32, 34, 35, 37, 38, 41, 43, 47, 49, 52, 53, 56, 58, 59, 61, 65, 67, 71, 73, 74, 76, 79, 83, 85, 89, 91, 92, 94, 95, 97, 98, 100, 103, 104, 106, 107, 109, 112, 113, 115, 116, 118, 119, 122, 124, 125, 127, 128, 130 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A055483(a(n)) = 1.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[Range[130], GCD[#, FromDigits[Reverse[IntegerDigits[#]]]] == 1 &] (* Jayanta Basu, Jul 24 2013 *)

PROG

(Haskell)

a226778 n = a226778_list !! (n-1)

a226778_list = filter ((== 1) . a055483) [1..]

(PARI) isok(n) = gcd(n, subst(Pol(Vecrev(digits(n))), x, 10)) == 1; \\ Michel Marcus, Jul 02 2015

(PARI) is(n)=gcd(fromdigits(Vecrev(digits(n))), n)==1 \\ Charles R Greathouse IV, Aug 25 2016

CROSSREFS

Cf. A071249 (complement).

Sequence in context: A070837 A188643 A087140 * A061837 A256477 A247464

Adjacent sequences:  A226775 A226776 A226777 * A226779 A226780 A226781

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Jun 18 2013

STATUS

approved

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Last modified October 15 13:06 EDT 2019. Contains 328030 sequences. (Running on oeis4.)