Number of distributive lattices; also number of paths with n turns when light is reflected from 8 glass plates.
A030112
Number of distributive lattices; also number of paths with n turns when light is reflected from 8 glass plates.
Terms
- a(0) =1a(1) =8a(2) =36a(3) =204a(4) =1086a(5) =5916a(6) =31998a(7) =173502a(8) =940005a(9) =5094220a(10) =27604798a(11) =149590922a(12) =810627389a(13) =4392774126a(14) =23804329059a(15) =128995094597a(16) =699021261776
External references
- oeis: A030112