Number of (n+1) X (5+1) 0..2 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically.
A253453
Number of (n+1) X (5+1) 0..2 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically.
Terms
- a(0) =8501a(1) =15220a(2) =19254a(3) =26831a(4) =44242a(5) =83003a(6) =170184a(7) =373130a(8) =864720a(9) =2104994a(10) =5356824a(11) =14174330a(12) =38750880a(13) =108728594a(14) =311157864a(15) =903437930a(16) =2650262640a(17) =7830705794a(18) =23251973304a(19) =69275651930a(20) =206866440000a(21) =618678308594
External references
- oeis: A253453