Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
A222504
Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
Terms
- a(0) =0a(1) =4a(2) =4a(3) =35a(4) =87a(5) =496a(6) =1335a(7) =7552a(8) =21382a(9) =122942a(10) =348597a(11) =2045395a(12) =5812073a(13) =34558802a(14) =98272393a(15) =589386556a(16) =1678849694a(17) =10123122248a(18) =28893573238a(19) =174842616458a(20) =500084523708
External references
- oeis: A222504