Number of (n+2)X4 0..2 arrays with each 3X3 subblock having sum 9.
A187641
Number of (n+2)X4 0..2 arrays with each 3X3 subblock having sum 9.
Terms
- a(0) =17701a(1) =79259a(2) =363533a(3) =1747075a(4) =9368309a(5) =51019403a(6) =283738813a(7) =1661843915a(8) =9825500309a(9) =58770460003a(10) =361966285061
External references
- oeis: A187641