Number of (n+3) X (3+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.
A230703
Number of (n+3) X (3+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) =30a(1) =244a(2) =2106a(3) =16536a(4) =130446a(5) =1025430a(6) =8053490a(7) =63237238a(8) =496590056a(9) =3899177780a(10) =30617038898a(11) =240407287782
External references
- oeis: A230703