A286217 Product of the n-th sexy prime triple.

1729, 11339, 49321, 146969, 386389, 1089019, 1221191, 3864241, 5171489, 12640949, 18181979, 21243961, 43974269, 51881689, 178433279, 208506509, 230324329, 278421569, 393806449, 849244031, 932539661, 1341880019, 1416207439, 1672403471, 1829232539, 2111885999

Offset

1,1

Links

Table of n, a(n) for n=1..26.

Wikipedia, Sexy Prime

Formula

a(n) = s(n)*(s(n)+6)*(s(n)+12), where s = A046118.

a(n) = A046118(n) * A046119(n) * A046120(n).

Example

The first sexy prime triple is (7, 13, 19) so a(1) = 7*13*19 = 1729.

Mathematica

Select[Prime@ Range@ 500, PrimeQ[# + {6, 12, 18}] == {True, True, False} &] // # (#+6) (#+12) & (* Giovanni Resta, May 05 2017 *)

Crossrefs

Cf. A023201, A046118, A046119, A046120.

Sequence in context: A245671 A154716 A154728 * A337316 A338998 A280428

Adjacent sequences: A286214 A286215 A286216 * A286218 A286219 A286220

Keyword

nonn,easy

Author

Connor Zapfel, May 04 2017

Status

approved