A138641 Nonnegative integers n such that 19*n-2 is prime.

1, 7, 15, 19, 21, 31, 37, 39, 45, 49, 51, 75, 79, 85, 99, 105, 109, 117, 121, 127, 141, 145, 147, 159, 169, 175, 177, 199, 207, 211, 219, 225, 229, 235, 247, 249, 259, 261, 271, 277, 285, 291, 297, 301, 309, 325, 327, 331, 345, 357, 361, 367, 381, 387, 397

Offset

1,2

Links

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

Example

19*1-2=17, 19*7-2=131, 19*15-2=283, ...

Mathematica

a={}; Do[x=19*n-2; If[PrimeQ[x], AppendTo[a, n]], {n, 10^2}]; a
Select[Range[400], PrimeQ[19#-2]&] (* Harvey P. Dale, Aug 22 2017 *)

Crossrefs

Sequence in context: A154618 A275190 A224891 * A297853 A298050 A115783

Adjacent sequences: A138638 A138639 A138640 * A138642 A138643 A138644

Keyword

nonn

Author

Vladimir Joseph Stephan Orlovsky, May 15 2008

Extensions

More terms from Harvey P. Dale, Aug 22 2017

Status

approved