not+divisible+by+2
131David Pye (furniture) — This article is about the furniture designer. For the scientist and engineer, see David Randall Pye. David William Pye OBE (18 November 1914–1 January 1993), was Professor of Furniture Design at The Royal College of Art from 1948 1974. Among his… …
132Semiperfect number — In mathematics, a semiperfect number or pseudoperfect number is a natural number n that is equal to the sum of all or some of its proper divisors.The first few semiperfect numbers are:6, 12, 18, 20, 24, 28, 30, 36, 40, ... OEIS|id=A005835;every… …
