Number of (2+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.

A250757

Number of (2+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.

Terms

    a(0) =105a(1) =237a(2) =423a(3) =663a(4) =957a(5) =1305a(6) =1707a(7) =2163a(8) =2673a(9) =3237a(10) =3855a(11) =4527a(12) =5253a(13) =6033a(14) =6867a(15) =7755a(16) =8697a(17) =9693a(18) =10743a(19) =11847a(20) =13005a(21) =14217a(22) =15483a(23) =16803a(24) =18177a(25) =19605a(26) =21087a(27) =22623a(28) =24213a(29) =25857

External references