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A172079 First differences of A181669. 0

%I

%S 6,12,24,12,48,60,12,48,120,12,480,180,300,48,120,132,408,180,792,120,

%T 48,300,660,132,288,240,12,300,540,240,780,120,48,732,1260,1188,600,

%U 1092,408,432,1848,480

%N First differences of A181669.

%t Differences[Select[6*Range[3000]-1,PrimeQ[#]&&PrimeOmega[#-1]==2&&AnyTrue[ {#+2,Sqrt[#+2]},PrimeQ]&]] (* _Harvey P. Dale_, Jul 01 2022 *)

%Y Cf. A181669.

%K nonn,easy

%O 1,1

%A _Giovanni Teofilatto_, Nov 19 2010

%E a(21) ff. corrected by _Georg Fischer_, Aug 31 2020

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Last modified February 7 06:02 EST 2023. Contains 360112 sequences. (Running on oeis4.)