Number of (2+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
A258555
Number of (2+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
Terms
- a(0) =44a(1) =112a(2) =210a(3) =344a(4) =506a(5) =683a(6) =894a(7) =1140a(8) =1421a(9) =1725a(10) =2071a(11) =2460a(12) =2892a(13) =3355a(14) =3868a(15) =4432a(16) =5047a(17) =5701a(18) =6413a(19) =7184a(20) =8014a(21) =8891a(22) =9834a(23) =10844a(24) =11921a(25) =13053a(26) =14259a(27) =15540a(28) =16896a(29) =18315
External references
- oeis: A258555