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

A280798 as a simple table

na(n)
01
12
213
316667
46927459779738887

[1,2,13,16667,6927459779738887]

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 7 01:39 EDT 2026. Contains 396344 sequences.
License Agreements, Terms of Use, Privacy Policy