Number of nX5 0..1 arrays with every element unequal to 0, 1, 2 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318340
Number of nX5 0..1 arrays with every element unequal to 0, 1, 2 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =16a(1) =42a(2) =76a(3) =148a(4) =393a(5) =1115a(6) =3321a(7) =10111a(8) =30943a(9) =95244a(10) =293401a(11) =904986a(12) =2792217a(13) =8617223a(14) =26597072a(15) =82096253a(16) =253412398a(17) =782236683a(18) =2414640760a(19) =7453642765a(20) =23008358869a(21) =71023687464a(22) =219240636280a(23) =676766784339
External references
- oeis: A318340