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A129214
Numbers m such that 8!*m-/+1 are twin primes.
4
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
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
KEYWORD
nonn
AUTHOR
Zak Seidov, Apr 03 2007
STATUS
approved