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 A073805 Numbers k such that 1 + k*R(k) is prime, where R(k) is the reverse of k. 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 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 * A352587 A301374 A130320 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 November 27 13:09 EST 2022. Contains 358405 sequences. (Running on oeis4.)