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

1,1

Links

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

Formula

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

Mathematica

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

Crossrefs

Intersection of A014574 and A025487.

Subsequence of A344385.

A068507 is a subsequence.

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

Sequence in context: A126259 A068570 A092320 * A056495 A351523 A263656

Adjacent sequences: A375194 A375195 A375196 * A375198 A375199 A375200

Keyword

nonn

Author

Amiram Eldar, Aug 04 2024

Status

approved