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A073805 Numbers n such that 1+n*R(n) is prime, where R(n) is the reverse of n. 1
1, 2, 4, 6, 10, 16, 18, 20, 24, 25, 26, 28, 36, 42, 50, 52, 58, 61, 62, 63, 66, 68, 70, 80, 81, 82, 85, 86, 90, 100, 108, 112, 116, 120, 132, 136, 138, 140, 152, 162, 170, 190, 198, 200, 204, 205, 209, 210, 211, 213, 214, 219, 223, 224, 228, 231, 234, 236, 238 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..59.

EXAMPLE

16 is a term because 16*61+1=977 is prime.

MATHEMATICA

Select[Range[250], PrimeQ[# IntegerReverse[#]+1]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Oct 05 2017 *)

CROSSREFS

Sequence in context: A134682 A327408 A083814 * A301374 A130320 A258599

Adjacent sequences:  A073802 A073803 A073804 * A073806 A073807 A073808

KEYWORD

easy,base,nonn

AUTHOR

Shyam Sunder Gupta, Aug 23 2002

STATUS

approved

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Last modified June 6 12:29 EDT 2020. Contains 334827 sequences. (Running on oeis4.)