Number of distributive lattices; also number of paths with n turns when light is reflected from 12 glass plates.
A030116
Number of distributive lattices; also number of paths with n turns when light is reflected from 12 glass plates.
Terms
- a(0) =1a(1) =12a(2) =78a(3) =650a(4) =5083a(5) =40690a(6) =323401a(7) =2576795a(8) =20514715a(9) =163369570a(10) =1300879372a(11) =10358963615a(12) =82488063476a(13) =656851828075
External references
- oeis: A030116