1,1

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Select[Range[2, 150], !PrimeQ[4 # - 5]&] (* Vincenzo Librandi, Apr 06 2013 *)

(MAGMA) [n: n in [2..150] | not IsPrime(4*n-5)]; // Vincenzo Librandi, Apr 06 2013

Cf. A156287.

Sequence in context: A350377 A121901 A024707 * A270535 A287110 A194425

Adjacent sequences: A156285 A156286 A156287 * A156289 A156290 A156291

nonn,easy

Vincenzo Librandi, Feb 07 2009

approved