Number of (1+1) X (n+1) 0..2 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.
A250899
Number of (1+1) X (n+1) 0..2 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) =37a(1) =127a(2) =403a(3) =1229a(4) =3673a(5) =10875a(6) =32095a(7) =94729a(8) =280069a(9) =829943a(10) =2465227a(11) =7338309a(12) =21883825a(13) =65356531a(14) =195414199a(15) =584800769a(16) =1751256541a(17) =5246953839a(18) =15726181411a(19) =47147086909a(20) =141374151817a(21) =423979849067
External references
- oeis: A250899