Number of (n+1) X (5+1) 0..1 arrays with every 2 X 2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.
A253228
Number of (n+1) X (5+1) 0..1 arrays with every 2 X 2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.
Terms
- a(0) =907a(1) =1775a(2) =1709a(3) =2543a(4) =3936a(5) =6414a(6) =11022a(7) =19851a(8) =37083a(9) =71082a(10) =138576a(11) =273021a(12) =541329a(13) =1077324a(14) =2148654a(15) =4290615a(16) =8573799a(17) =17139390a(18) =34269756a(19) =68529633a(20) =137048493a(21) =274085280a(22) =548157882a(23) =1096302075a(24) =2192589411a(25) =4385162994
External references
- oeis: A253228