A129213 Numbers m such that 7!*m-/+1 are twin primes.

7, 11, 13, 20, 22, 37, 41, 46, 47, 48, 56, 57, 90, 102, 103, 135, 142, 164, 190, 216, 217, 230, 241, 254, 279, 290, 318, 332, 333, 340, 362, 385, 405, 407, 420, 428, 431, 470, 473, 476, 486, 494, 499, 518, 526, 531, 553, 554, 565, 571, 584, 587, 592, 605, 609

Offset

1,1

Links

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

Formula

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

Mathematica

s={}; Do[m=5040k; If[PrimeQ[m-1]&&PrimeQ[m+1], AppendTo[s, k]], {k, 1000}]; s

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: A129214 (N=8), A129215 (N=9), A129216 (N=10).

Sequence in context: A084444 A081091 A027901 * A110966 A163388 A297176

Adjacent sequences: A129210 A129211 A129212 * A129214 A129215 A129216

Keyword

nonn

Author

Zak Seidov, Apr 03 2007

Status

approved