The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A058805 Number of labeled vertically indecomposable lattices with a fixed top and bottom. 2
1, 1, 1, 0, 1, 7, 97, 1981, 56611, 2151857, 104905809, 6375234313, 472007532691, 41778412444165, 4351370158008721, 526176012328671173, 73022861716667028531, 11515387009980686269561 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,6
LINKS
Table of n, a(n) for n=0..17.
CROSSREFS
a(n)=A058803(n)/(n*(n-1))=A058804(n)/(n-1).
Sequence in context: A083083 A022007 A174516 * A305137 A132061 A368439
Adjacent sequences: A058802 A058803 A058804 * A058806 A058807 A058808
KEYWORD
nonn,hard
AUTHOR
Christian G. Bower, Dec 28 2000
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 20 15:51 EDT 2024. Contains 372717 sequences. (Running on oeis4.)