Number of (1+1) X (n+1) 0..3 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.

A250878

Number of (1+1) X (n+1) 0..3 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) =90a(1) =288a(2) =678a(3) =1328a(4) =2306a(5) =3680a(6) =5518a(7) =7888a(8) =10858a(9) =14496a(10) =18870a(11) =24048a(12) =30098a(13) =37088a(14) =45086a(15) =54160a(16) =64378a(17) =75808a(18) =88518a(19) =102576a(20) =118050a(21) =135008a(22) =153518a(23) =173648a(24) =195466a(25) =219040a(26) =244438a(27) =271728a(28) =300978a(29) =332256

External references