Journal of Integer Sequences, Vol. 26 (2023), Article 23.7.7

Divisibility Properties of Dedekind Numbers

Bartłomiej Pawelski and Andrzej Szepietowski
Institute of Informatics
University of Gdańsk


We study some divisibility properties of Dedekind numbers. We show that the ninth Dedekind number is congruent to 6 modulo 210.

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(Concerned with sequences A000372 A001206 A003182 A220879.)

Received March 15 2023; revised versions received March 16 2023; May 17 2023; June 13 2023; June 14 2023. Published in Journal of Integer Sequences, August 16 2023.

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