A172079 First differences of A181669.

6, 12, 24, 12, 48, 60, 12, 48, 120, 12, 480, 180, 300, 48, 120, 132, 408, 180, 792, 120, 48, 300, 660, 132, 288, 240, 12, 300, 540, 240, 780, 120, 48, 732, 1260, 1188, 600, 1092, 408, 432, 1848, 480

Offset

1,1

Links

Table of n, a(n) for n=1..42.

Mathematica

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

Crossrefs

Cf. A181669.

Sequence in context: A192754 A005694 A309359 * A081512 A096387 A094185

Adjacent sequences: A172076 A172077 A172078 * A172080 A172081 A172082

Keyword

nonn,easy

Author

Giovanni Teofilatto, Nov 19 2010

Extensions

a(21) ff. corrected by Georg Fischer, Aug 31 2020

Status

approved