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A076055 Composite numbers which when read backwards are primes. 3
14, 16, 20, 30, 32, 34, 35, 38, 50, 70, 74, 76, 91, 92, 95, 98, 104, 106, 110, 112, 118, 119, 124, 125, 128, 130, 133, 134, 136, 140, 142, 145, 146, 152, 160, 164, 166, 170, 172, 175, 182, 188, 194, 196, 200, 300, 301, 305, 310, 316, 320, 322, 325, 328, 332 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..54.

MATHEMATICA

Rev[n_]:=FromDigits[Reverse[IntegerDigits[n]]]; Select[Range[332], !PrimeQ[#] && PrimeQ[Rev[#]]&] (* Jayanta Basu, May 01 2013 *)

CROSSREFS

Cf. A076056.

Sequence in context: A217707 A176686 A007935 * A068653 A225193 A102616

Adjacent sequences:  A076052 A076053 A076054 * A076056 A076057 A076058

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Oct 04 2002

EXTENSIONS

Corrected and extended by Sascha Kurz, Jan 20 2003

STATUS

approved

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Last modified October 21 02:00 EDT 2021. Contains 348139 sequences. (Running on oeis4.)