Number of nX7 0..4 arrays with each element equal to the number its horizontal and vertical neighbors equal to itself.
A195968
Number of nX7 0..4 arrays with each element equal to the number its horizontal and vertical neighbors equal to itself.
Terms
- a(0) =1a(1) =1a(2) =35a(3) =222a(4) =804a(5) =2906a(6) =13302a(7) =45127a(8) =175176a(9) =652860a(10) =2507734a(11) =9514328a(12) =36686968a(13) =139109262a(14) =525936593a(15) =1999213462a(16) =7634702278a(17) =29077719792a(18) =110526633168a(19) =420713628093
External references
- oeis: A195968