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A108594
Numbers k such that 10*k + 101 is prime.
2
0, 3, 5, 8, 9, 11, 14, 15, 17, 18, 21, 23, 30, 32, 33, 36, 39, 42, 44, 47, 50, 53, 54, 56, 59, 60, 65, 66, 71, 72, 78, 81, 84, 87, 89, 92, 93, 95, 96, 99, 105, 107, 108, 110, 113, 119, 120, 122, 126, 128, 135, 137, 138, 141, 143, 147, 150, 152, 162, 164, 170, 171, 173
OFFSET
1,2
LINKS
EXAMPLE
If n=33 then 10*n + 101 = 431 (prime).
MAPLE
a:=proc(n) if isprime(10*n+101)=true then n else fi end: seq(a(n), n=0..200); # Emeric Deutsch, Jul 13 2005
MATHEMATICA
Select[Range[0, 300], PrimeQ[10*# +101] &] (* G. C. Greubel, Oct 21 2023 *)
PROG
(PARI) is(n)=isprime(10*n+101) \\ Charles R Greathouse IV, Jun 13 2017
(Magma) [n: n in [0..300] | IsPrime(10*n+101)]; // G. C. Greubel, Oct 21 2023
(SageMath) [n for n in (0..300) if is_prime(10*n+101)] # G. C. Greubel, Oct 21 2023
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Parthasarathy Nambi, Jul 05 2005
EXTENSIONS
More terms from Emeric Deutsch, Jul 13 2005
STATUS
approved