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A129216
Numbers m such that 10!*m-/+1 are twin primes.
4
14, 20, 39, 61, 70, 72, 84, 107, 136, 235, 279, 281, 282, 319, 324, 360, 369, 422, 451, 513, 539, 547, 594, 598, 611, 647, 673, 684, 744, 783, 809, 823, 851, 911, 918, 919, 935, 957, 968
OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000 (terms 1..1000 from Harvey P. Dale)
FORMULA
10!*a(n) are terms in A014574.
MATHEMATICA
s={}; Do[m=3628800k; If[PrimeQ[m-1]&&PrimeQ[m+1], AppendTo[s, k]], {k, 1000}]; s
With[{c=10!}, Select[Range[1000], And@@PrimeQ[c #+{1, -1}]&]] (* Harvey P. Dale, Jun 23 2012 *)
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), A129214 (N=8), A129215 (N=9).
Sequence in context: A063848 A110968 A054017 * A259536 A067796 A015797
KEYWORD
nonn
AUTHOR
Zak Seidov, Apr 04 2007
STATUS
approved