Some 2-adic Integers Related to the Odd Part of 2e!
Donald M. Davis
Department of Mathematics
Lehigh University
Bethlehem, PA 18015
USA
Abstract:
The odd part of 2e! as e → ∞
leads to a 2-adic integer z. The bits of z
were publicized in OEIS sequence A359349,
where two
conjectures were made, relevant to computing z. We prove both of those
conjectures. A second 2-adic integer,
the limit of ((2e-1)!!–1)/2e,
plays a key role in one proof.