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A235604 Number of equivalence classes of lattices of subsets of the power set 2^[n]. 0
1, 1, 1, 4, 50, 7443 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..5.

Donald M. Davis, Enumerating lattices of subsets, arXiv preprint arXiv:1311.6664, 2013

CROSSREFS

Sequence in context: A327229 A231832 A193157 * A221477 A122464 A226375

Adjacent sequences:  A235601 A235602 A235603 * A235605 A235606 A235607

KEYWORD

nonn,more,hard

AUTHOR

N. J. A. Sloane, Jan 21 2014

EXTENSIONS

a(5) from Andrew Weimholt, Jan 27 2014

STATUS

approved

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Last modified November 18 22:50 EST 2019. Contains 329305 sequences. (Running on oeis4.)