On integers n for which sigma - (2n+1) >= sigma (2n)

Kobayashi, M; Trudgian, T

Trudgian, T (corresponding author), Univ New South Wales Canberra, Sch Sci, Canberra, ACT, Australia.

JOURNAL OF NUMBER THEORY, 2020; 215 (): 138

Abstract

We show that the natural density of positive integers n for which sigma(2n + 1) >= sigma(2n) is between 0.053 and 0.055. (C) 2020 Elsevier Inc. All......

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