login
A159483
Number of tolerance simple lattices of order n
0
1, 1, 0, 0, 1, 1, 4, 14, 71, 389
OFFSET
1,7
COMMENTS
Relevant for order polynomial completeness of lattices and tame congruence theory.
REFERENCES
K.Kaarli and A.F.Pixley, Polynomial Completeness in Algebraic Systems, Chapman & Hall/CRC, 2001
EXAMPLE
The unique lattices of order 1 and 2 are tolerance simple. The lattices of order 3 and 4 are not. M_3 is of order 5 and is tolerance simple. M_4 is of order 6 and is tolerance simple. Then it gets complicated.
CROSSREFS
Number of lattices is A006966
Sequence in context: A321273 A322700 A167144 * A374835 A088127 A242739
KEYWORD
nonn
AUTHOR
Tim Boykett (tim(AT)timesup.org), Apr 14 2009
STATUS
approved