A129214 Numbers m such that 8!*m-/+1 are twin primes.

6, 7, 27, 73, 74, 78, 87, 88, 96, 99, 109, 131, 146, 164, 165, 173, 179, 198, 202, 213, 214, 215, 220, 228, 239, 286, 320, 342, 348, 397, 400, 419, 468, 511, 516, 527, 532, 543, 569, 571, 578, 584, 590, 595, 621, 624, 649, 663, 679, 686, 707, 715, 716, 723

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Formula

8!*a(n) are terms in A014574.

Mathematica

s={}; Do[m=40320k; If[PrimeQ[m-1]&&PrimeQ[m+1], AppendTo[s, k]], {k, 1000}]; s
Select[Range[800], AllTrue[40320#+{1, -1}, PrimeQ]&] (* Harvey P. Dale, Oct 05 2022 *)

Crossrefs

Cf. A014574 (Average of twin prime pairs), A127545 (Multiples of 7 such that n -/+ 1 are twin primes).

Numbers m such that (N!*m -/+ 1) are twin primes: A129213 (N=7), A129215 (N=9), A129216 (N=10).

Sequence in context: A067229 A291606 A041535 * A042419 A037956 A095369

Adjacent sequences: A129211 A129212 A129213 * A129215 A129216 A129217

Keyword

nonn

Author

Zak Seidov, Apr 03 2007

Status

approved