Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
The OEIS is supported by the many generous donors to the OEIS Foundation.
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A109458
Number of inequivalent Krom functions on n variables (or 2SAT instances) under permutations of variables.
1
2, 4, 12, 48, 308, 3028, 49490, 1350894, 62154403
(list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
REFERENCES
D. E. Knuth, The Art of Computer Programming, Vol. 4A, Section 7.1.1, p. 79.
LINKS
Table of n, a(n) for n=0..8.
CROSSREFS
See A109457 for definitions and references.
Sequence in context: A372145 A082480 A093934 * A375516 A030963 A030879
Adjacent sequences: A109455 A109456 A109457 * A109459 A109460 A109461
KEYWORD
nonn,hard,more
AUTHOR
Don Knuth, Aug 24 2005
STATUS
approved

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 September 28 16:16 EDT 2024. Contains 376297 sequences.
License Agreements, Terms of Use, Privacy Policy