Number of (6+1) X (n+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
A250774
Number of (6+1) X (n+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
Terms
- a(0) =288a(1) =514a(2) =820a(3) =1234a(4) =1812a(5) =2666a(6) =4020a(7) =6322a(8) =10468a(9) =18250a(10) =33252a(11) =62642a(12) =120756a(13) =236266a(14) =466516a(15) =926194a(16) =1844676a(17) =3680714a(18) =7351812a(19) =14692978a(20) =29374228a(21) =58735594a(22) =117457140a(23) =234898994a(24) =469781412a(25) =939544906a(26) =1879070500a(27) =3758120242
External references
- oeis: A250774