1/4 the number of (n+1) X 4 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.
A184598
1/4 the number of (n+1) X 4 binary arrays with equal numbers of 2 X 2 subblocks with sums 1 and 3.
Terms
- a(0) =16a(1) =156a(2) =1986a(3) =28192a(4) =411825a(5) =6045460a(6) =89538170a(7) =1339793447a(8) =20215904926a(9) =306972320468
External references
- oeis: A184598