Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum less than the central column sum.
A258888
Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum less than the central column sum.
Terms
- a(0) =900a(1) =2304a(2) =4489a(3) =10680a(4) =23409a(5) =51188a(6) =104329a(7) =216395a(8) =430336a(9) =849760a(10) =1635841a(11) =3133971a(12) =5904900a(13) =11044072a(14) =20421361a(15) =37522132a(16) =68376361a(17) =123865010a(18) =222994489a(19) =399409023a(20) =711929124a(21) =1263316100a(22) =2233035025a(23) =3931870085a(24) =6900957184
External references
- oeis: A258888