Number of (n+3)X(7+3) 0..2 white 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.
A230707
Number of (n+3)X(7+3) 0..2 white 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) =3956a(1) =173428a(2) =8053490a(3) =342031378a(4) =14669811856a(5) =625553036008
External references
- oeis: A230707