Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally and vertically.
A254840
Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally and vertically.
Terms
- a(0) =8776a(1) =37642a(2) =131776a(3) =340387a(4) =638688a(5) =1102937a(6) =1795490a(7) =2870508a(8) =4430116a(9) =6683904a(10) =10055304a(11) =15093286a(12) =22291032a(13) =32547096a(14) =47859712a(15) =70745132a(16) =103395658a(17) =150104280a(18) =220329220a(19) =325793112a(20) =476694716a(21) =693576838a(22) =1021640120a(23) =1516194028
External references
- oeis: A254840