Half the number of n X n nonnegative integer arrays with every 2 X 2 subblock summing to 2.
A145012
Half the number of n X n nonnegative integer arrays with every 2 X 2 subblock summing to 2.
Terms
- a(0) =5a(1) =17a(2) =37a(3) =95a(4) =185a(5) =431a(6) =805a(7) =1799a(8) =3305a(9) =7247a(10) =13237a(11) =28775a(12) =52505a(13) =113711
External references
- oeis: A145012