Cardinality of the free modular lattice generated by two elements and a chain of length n.
A128941
Cardinality of the free modular lattice generated by two elements and a chain of length n.
Terms
- a(0) =4a(1) =28a(2) =138a(3) =629a(4) =2784a(5) =12134a(6) =52366a(7) =224404a(8) =956514a(9) =4060036a(10) =17175130a(11) =72454073a(12) =304941384a(13) =1280898302a(14) =5371301502a(15) =22491017756a(16) =94055344242a(17) =392888085098
External references
- oeis: A128941