Half the number of n X 1 0..3 arrays with no element equal to the average of its horizontal and vertical neighbors.
A197102
Half the number of n X 1 0..3 arrays with no element equal to the average of its horizontal and vertical neighbors.
Terms
- a(0) =2a(1) =6a(2) =16a(3) =61a(4) =212a(5) =753a(6) =2661a(7) =9415a(8) =33302a(9) =117802a(10) =416703a(11) =1474018a(12) =5214089a(13) =18443961a(14) =65242401a(15) =230783990a(16) =816359440a(17) =2887733833a(18) =10214871388a(19) =36133384697a(20) =127815754113a(21) =452126672783
External references
- oeis: A197102