Number of 2Xn 0..2 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
A222489
Number of 2Xn 0..2 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =0a(1) =0a(2) =4a(3) =5a(4) =14a(5) =100a(6) =152a(7) =998a(8) =2168a(9) =10768a(10) =25816a(11) =125264a(12) =303568a(13) =1457312a(14) =3658176a(15) =16964356a(16) =44394392a(17) =199079568a(18) =539372480a(19) =2352788576a(20) =6567620800a(21) =27950582336a(22) =80148609344a(23) =333551963152a(24) =979715239584
External references
- oeis: A222489