Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.
A222285
Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.
Terms
- a(0) =0a(1) =4a(2) =4a(3) =35a(4) =83a(5) =532a(6) =1427a(7) =8540a(8) =23798a(9) =143594a(10) =405187a(11) =2455279a(12) =6993039a(13) =42590466a(14) =121981025a(15) =745909396a(16) =2145554406a(17) =13161790760a(18) =37983541068a(19) =233613349710a(20) =675981684148
External references
- oeis: A222285