A229202 Number of semimodular lattices on n nodes.
1, 1, 1, 1, 2, 4, 8, 17, 38, 88, 212, 530, 1376, 3693, 10232, 29231, 85906, 259291, 802308, 2540635, 8220218, 27134483, 91258141, 312324027, 1086545705, 3838581926
Offset: 0
Links
- P. Jipsen and N. Lawless, Generating all modular lattices of a given size
- J. Kohonen, Generating modular lattices up to 30 elements, arXiv:1708.03750 [math.CO] preprint (2017).
Extensions
a(23)-a(25) from Kohonen (2017), by Jukka Kohonen, Aug 15 2017