Half the number of (n+2) X 3 binary arrays with each 3 X 3 subblock having sum 3, 4, 5 or 6.
A187309
Half the number of (n+2) X 3 binary arrays with each 3 X 3 subblock having sum 3, 4, 5 or 6.
Terms
- a(0) =210a(1) =1472a(2) =10262a(3) =71836a(4) =502545a(5) =3516295a(6) =24602854a(7) =172142801a(8) =1204456419a(9) =8427400133a(10) =58965241283a(11) =412570864570
External references
- oeis: A187309