Number of nX3 0..1 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..1 introduced in row major order.
A240651
Number of nX3 0..1 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..1 introduced in row major order.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =17a(4) =43a(5) =136a(6) =402a(7) =1180a(8) =3518a(9) =10525a(10) =31454a(11) =94059a(12) =281484a(13) =842574a(14) =2522415a(15) =7552239a(16) =22613578a(17) =67714627a(18) =202772197a(19) =607215863a(20) =1818375168a(21) =5445371326a(22) =16306993036a(23) =48833947510a(24) =146241553581a(25) =437945846008
External references
- oeis: A240651