A233348 Numbers n such that 3*n+2 and 3*n-2 are both prime for n multiple of 5 (A008587).

5, 15, 35, 55, 65, 75, 105, 155, 205, 215, 225, 275, 285, 295, 365, 405, 435, 475, 495, 555, 565, 595, 625, 665, 695, 735, 765, 825, 895, 945, 985, 1055, 1085, 1115, 1155, 1205, 1225, 1265, 1315, 1335, 1385, 1505, 1595, 1605, 1645, 1745, 1805, 1835, 1885

Offset

1,1

Links

Table of n, a(n) for n=1..49.

Formula

Intersection of A008587 and A157834.

Example

For n=15; 3*15+2=47 and 3*15-2=43.

Mathematica

Select[5*Range[500], PrimeQ[3 # + 2] && PrimeQ[3 # - 2] &] (* T. D. Noe, Dec 09 2013 *)

Prog

(TI-BASIC) Clrio:5(sto)n:Lbl colorin:if isPrime(3n+2) and isPrime(3n-2) Then:Disp n:Pause: EndIf:n+5(sto)n:Goto colorin:EndPrgm

Crossrefs

Cf. A157834 (n such that 3n-2 and 3n+2 are both prime).

Sequence in context: A072186 A051807 A034052 * A061829 A063382 A069983

Adjacent sequences: A233345 A233346 A233347 * A233349 A233350 A233351

Keyword

nonn,less

Author

César Aguilera, Dec 07 2013

Status

approved