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A109604

Numbers n such that 41*n - 43 is prime.

10, 12, 16, 22, 24, 30, 36, 40, 52, 60, 66, 72, 82, 100, 102, 112, 120, 142, 144, 154, 156, 162, 166, 186, 192, 196, 214, 222, 234, 252, 256, 264, 270, 276, 280, 282, 294, 304, 306, 322, 324, 330, 346, 352, 360, 376, 382, 394, 396, 406, 414, 424, 432, 462, 472

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..55.

EXAMPLE

If n=10 then 41*n - 43 = 367 (prime).

If n=82 then 41*n - 43 = 3319 (prime).

MAPLE

select(n-> isprime(41*n-43), [$0..600])[]; # Emeric Deutsch, Aug 07 2005

MATHEMATICA

Select[Range[2, 500], PrimeQ[41#-43]&] (* Harvey P. Dale, Apr 06 2016 *)