Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally and vertically.
A256897
Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column plus the two sums of the diagonal and antidiagonal nondecreasing horizontally and vertically.
Terms
- a(0) =512a(1) =2444a(2) =9374a(3) =34698a(4) =113474a(5) =330684a(6) =914320a(7) =2433544a(8) =6176662a(9) =15093057a(10) =35958908a(11) =83879816a(12) =191591614a(13) =430057344a(14) =952623906a(15) =2086634822a(16) =4522903834a(17) =9718017421a(18) =20736059936a(19) =43980645588a(20) =92782630758a(21) =194864839161
External references
- oeis: A256897