login
The OEIS is supported by the many generous donors to the OEIS Foundation.
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)

A020861 as a constant (usually base 10)

3.16992500144231236290747788789563301751\
9628815384962120911505309082196455588717\
12504456094983617648

Lookup Welcome Wiki Register Music Plot 2 Demos Index WebCam Contribute Format Style Sheet Transforms Superseeker Recents
The OEIS Community
Maintained by The OEIS Foundation Inc.
Last modified June 4 06:28 EDT 2026. Contains 396291 sequences.
License Agreements, Terms of Use, Privacy Policy