Number of nX3 0..3 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A222661
Number of nX3 0..3 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =0a(1) =2a(2) =2a(3) =44a(4) =110a(5) =2686a(6) =7624a(7) =186400a(8) =568750a(9) =13426930a(10) =43148672a(11) =976797964a(12) =3288287090a(13) =71553941138a(14) =250795793620
External references
- oeis: A222661