Number of nXnXn triangular binary arrays with every 1 adjacent to exactly 3 other 1s.
A192443
Number of nXnXn triangular binary arrays with every 1 adjacent to exactly 3 other 1s.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =2a(10) =4a(11) =13a(12) =35a(13) =87a(14) =286a(15) =908a(16) =4080a(17) =23994a(18) =186034a(19) =1891698
External references
- oeis: A192443