Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally and vertically.
A254890
Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally and vertically.
Terms
- a(0) =35272a(1) =149931a(2) =822072a(3) =4577708a(4) =15790369a(5) =51232136a(6) =141957783a(7) =315713348a(8) =681770400a(9) =1433996470a(10) =2855106608a(11) =5527208360a(12) =10355612789a(13) =18793033325a(14) =33853669795a(15) =60750807357a(16) =108653839544a(17) =194562098838a(18) =348578376839
External references
- oeis: A254890