A383241 a(n) = p(n)*p(n+1)*(p(n+1) - p(n)) - 1, where p(n) = prime(n).

5, 29, 69, 307, 285, 883, 645, 1747, 4001, 1797, 6881, 6067, 3525, 8083, 14945, 18761, 7197, 24521, 19027, 10365, 34601, 26227, 44321, 69063, 39187, 20805, 44083, 23325, 49267, 200913, 66547, 107681, 38085, 207109, 44997, 142241, 153545, 108883, 173345

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Example

a(n) = A383242(n) - 2.

Mathematica

z = 60; p[n_] := Prime[n];
f[n_] := p[n]*p[n + 1]*(p[n + 1] - p[n])
Table[f[n] - 1, {n, 1, z}]  (* A383241 *)
Table[f[n] + 1, {n, 1, z}]  (* A383242 *)

Crossrefs

Cf. A000042, A383242, A383243, A383244.

Sequence in context: A301858 A293174 A108928 * A097812 A176333 A100559

Adjacent sequences: A383238 A383239 A383240 * A383242 A383243 A383244

Keyword

nonn

Author

Clark Kimberling, May 07 2025

Status

approved