Number of nX3 0..2 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
A203455
Number of nX3 0..2 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =9a(2) =84a(3) =543a(4) =3748a(5) =29677a(6) =237999a(7) =1882149a(8) =14936068a(9) =119307906a(10) =954802767a(11) =7642229473a(12) =61191946032a(13) =490168235993
External references
- oeis: A203455