Number of (3+1) X (n+1) 0..1 arrays with no 2 X 2 subblock having x11-x00 less than x10-x01.
A251270
Number of (3+1) X (n+1) 0..1 arrays with no 2 X 2 subblock having x11-x00 less than x10-x01.
Terms
- a(0) =108a(1) =480a(2) =1667a(3) =4930a(4) =13052a(5) =31936a(6) =73805a(7) =163604a(8) =351804a(9) =740008a(10) =1532159a(11) =3136950a(12) =6372636a(13) =12876648a(14) =25924809a(15) =52069752a(16) =104417740a(17) =209182288a(18) =418791387a(19) =838101930a(20) =1676828540a(21) =3354401200a(22) =6709680485a(23) =13420387996
External references
- oeis: A251270