Number of (7+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.
A250775
Number of (7+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) =576a(1) =1026a(2) =1622a(3) =2396a(4) =3412a(5) =4798a(6) =6810a(7) =9960a(8) =15272a(9) =24794a(10) =42622a(11) =76948a(12) =144156a(13) =277014a(14) =541058a(15) =1067360a(16) =2118064a(17) =4217458a(18) =8414118a(19) =16805196a(20) =33584996a(21) =67142126a(22) =134253802a(23) =268474456a(24) =536912952a(25) =1073787018a(26) =2147532110a(27) =4295019140
External references
- oeis: A250775