Number of nX5 0..1 arrays with every element equal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300432
Number of nX5 0..1 arrays with every element equal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =3a(1) =37a(2) =87a(3) =238a(4) =704a(5) =2104a(6) =6235a(7) =18461a(8) =54864a(9) =165251a(10) =497102a(11) =1500726a(12) =4542437a(13) =13802952a(14) =42043561a(15) =128343104a(16) =392429834a(17) =1201823739a(18) =3685689654a(19) =11316538154a(20) =34781400484a(21) =106992787236a(22) =329361530696
External references
- oeis: A300432