A353022 Products of four distinct primes between twin primes.

462, 570, 858, 1230, 1290, 1302, 1482, 1722, 2130, 3390, 3930, 4002, 4218, 4242, 4422, 5010, 5478, 5502, 5658, 6690, 6870, 7458, 7878, 8430, 8862, 9042, 9462, 9858, 9930, 10038, 10302, 11058, 11118, 11490, 11778, 13002, 13710, 13830, 13902, 14010, 15270, 15738

Offset

1,1

Links

Table of n, a(n) for n=1..42.

Example

462 = 2*3*7*11 between 461 and 463 (twin primes);
570 = 2*3*5*19 between 569 and 571;
858 = 2*3*11*13 between 857 and 859;
1230 = 2*3*5*41 between 1229 and 1231.

Mathematica

Select[Range[20000], And @@ PrimeQ[# + {-1, 1}] && FactorInteger[#][[;; , 2]] == {1, 1, 1, 1} &] (* Amiram Eldar, Apr 17 2022 *)

Crossrefs

Intersection of A014574 and A046386.

Cf. A001097.

Sequence in context: A267396 A258962 A267332 * A104397 A108749 A267740

Adjacent sequences: A353019 A353020 A353021 * A353023 A353024 A353025

Keyword

nonn

Author

Massimo Kofler, Apr 17 2022

Status

approved