Number of (2+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.

A250879

Number of (2+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) =440a(1) =1456a(2) =3442a(3) =6728a(4) =11644a(5) =18520a(6) =27686a(7) =39472a(8) =54208a(9) =72224a(10) =93850a(11) =119416a(12) =149252a(13) =183688a(14) =223054a(15) =267680a(16) =317896a(17) =374032a(18) =436418a(19) =505384a(20) =581260a(21) =664376a(22) =755062a(23) =853648a(24) =960464a(25) =1075840a(26) =1200106a(27) =1333592a(28) =1476628a(29) =1629544

External references