Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300877
Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =50a(2) =148a(3) =589a(4) =2264a(5) =8739a(6) =34693a(7) =138559a(8) =556973a(9) =2247619a(10) =9087826a(11) =36797650a(12) =149145738a(13) =604912470a(14) =2454539244a(15) =9962718432a(16) =40445652520a(17) =164218445897a(18) =666820225171
External references
- oeis: A300877