Number of (5+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.
A250857
Number of (5+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.
Terms
- a(0) =54410a(1) =291165a(2) =1043885a(3) =2955136a(4) =7134786a(5) =15344785a(6) =30214465a(7) =55486360a(8) =96292546a(9) =159461501a(10) =253855485a(11) =390738440a(12) =584174410a(13) =851456481a(14) =1213566241a(15) =1695663760a(16) =2327608090a(17) =3144508285a(18) =4187304941a(19) =5503382256a(20) =7147210610
External references
- oeis: A250857