Number of nX2 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors.
A282856
Number of nX2 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors.
Terms
- a(0) =4a(1) =11a(2) =31a(3) =89a(4) =251a(5) =715a(6) =2028a(7) =5761a(8) =16358a(9) =46452a(10) =131910a(11) =374581a(12) =1063696a(13) =3020560a(14) =8577449a(15) =24357268a(16) =69167021a(17) =196412696a(18) =557750593a(19) =1583837157a(20) =4497601906a(21) =12771782030a(22) =36267864414a(23) =102989386002a(24) =292457628811a(25) =830488149997
External references
- oeis: A282856