Number of (n+3)X(2+3) 0..2 black square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.
A230736
Number of (n+3)X(2+3) 0..2 black square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.
Terms
- a(0) =8a(1) =66a(2) =244a(3) =2016a(4) =6576a(5) =54138a(6) =173428a(7) =1427040a(8) =4558536a(9) =37506738a(10) =119758148a(11) =985334832a(12) =3145930352a(13) =25883741898a(14) =82639468964a(15) =679931791152
External references
- oeis: A230736