A350688 a(n) = (q^2 - A340116(n)^2)/2^n where q is the next prime after A340116(n).

5, 2, 1, 3, 1, 21, 45, 15, 3, 9, 105, 39, 63, 105, 3, 75, 57, 99, 273, 69, 3, 231, 15, 315, 33, 495, 603, 39, 1617, 975, 63, 285, 1995, 171, 765, 141, 603, 429, 1677, 339, 2793, 231, 273, 315, 435, 9, 765, 69, 4257, 735, 1485, 1245, 423, 585, 375, 1155, 333, 645, 105, 231, 1965, 1209, 63, 735

Offset

0,1

Links

Robert Israel, Table of n, a(n) for n = 0..1000

Example

A340116(5) = 53 and the next prime is 59, so a(5) = (59^2 - 53^2)/2^5 = 21.

Crossrefs

Cf. A340116.

Sequence in context: A158625 A133615 A136161 * A197383 A348186 A356030

Adjacent sequences: A350685 A350686 A350687 * A350689 A350690 A350691

Keyword

nonn

Author

J. M. Bergot and Robert Israel, Jan 11 2022

Status

approved