A034936 - OEIS

A034936

Numbers k such that 3*k + 4 is prime.

1, 3, 5, 9, 11, 13, 19, 21, 23, 25, 31, 33, 35, 41, 45, 49, 51, 53, 59, 63, 65, 69, 73, 75, 79, 89, 91, 93, 101, 103, 109, 111, 115, 121, 123, 125, 131, 135, 139, 143, 145, 151, 153, 161, 165, 173, 179, 181, 189, 191, 199, 201, 203, 205, 209, 213, 219, 223, 229

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OFFSET

1,2

COMMENTS

Related to hyperperfect numbers of a certain form.

LINKS

Daniel Starodubtsev, Table of n, a(n) for n = 1..10000

J. S. McCranie, A study of hyperperfect numbers, J. Int. Seqs. Vol. 3 (2000) #P00.1.3.

MATHEMATICA

lst={}; Do[p=n+(n+1)+(n+3); If[PrimeQ[p], AppendTo[lst, n]], {n, 5!}]; lst (* Vladimir Joseph Stephan Orlovsky, May 22 2009 *)

Select[Range[300], PrimeQ[3#+4]&] (* Harvey P. Dale, Aug 25 2016 *)

PROG