A375197 Terms k in A025487 such that k-1 and k+1 are twin primes.

4, 6, 12, 30, 60, 72, 180, 192, 240, 420, 432, 1152, 2310, 2592, 3360, 6300, 7560, 9240, 15360, 21600, 23040, 26880, 55440, 100800, 110880, 138240, 180180, 241920, 264600, 345600, 415800, 453600, 737280, 786432, 995328, 1088640, 1921920, 1940400, 2116800, 3456000

Offset: 1

Author

Amiram Eldar, Aug 04 2024

Keywords

• nonn

Links

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

Crossrefs

Intersection of A014574 and A025487.

Subsequence of A344385.

A068507 is a subsequence.

Cf. A001097, A001359, A006512, A344384, A375198.

Programs

Mathematica

Select[Cases[Import["https://oeis.org/A025487/b025487.txt", "Table"], {, }][[;; , 2]], And @@ PrimeQ[# + {-1, 1}] &]

Formula

a(n) = A025487(A375198(n)).