A129075 Numbers n such that (n-4)/3 is prime.

10, 13, 19, 25, 37, 43, 55, 61, 73, 91, 97, 115, 127, 133, 145, 163, 181, 187, 205, 217, 223, 241, 253, 271, 295, 307, 313, 325, 331, 343, 385, 397, 415, 421, 451, 457, 475, 493, 505, 523, 541, 547, 577, 583, 595, 601, 637, 673, 685, 691, 703, 721, 727, 757

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Formula

a(n) = 3*prime(n) + 4. - Zak Seidov, May 12 2007

Example

For n=10, (10-4)/3 = 2 which is prime so 10 is the first entry.

Mathematica

Select[Range[7, 1000, 3], PrimeQ[(#-4)/3]&] (* Harvey P. Dale, Aug 17 2021 *)

Prog

(PARI) g(m) = forprime(p=2, m, n=3*p+4; print1(n", "))

Crossrefs

Cf. A000040.

Sequence in context: A120155 A363079 A159839 * A095918 A376272 A191969

Adjacent sequences: A129072 A129073 A129074 * A129076 A129077 A129078

Keyword

easy,nonn

Author

Cino Hilliard, May 11 2007, May 17 2007

Status

approved