Number of (7+2)X(n+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, vertically and ne-to-sw antidiagonally.
A259012
Number of (7+2)X(n+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, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =914320a(1) =459014a(2) =134036a(3) =49839a(4) =35404a(5) =49717a(6) =73734a(7) =133352a(8) =251774a(9) =493203a(10) =985500a(11) =1990343a(12) =4028838a(13) =8113534a(14) =16154696a(15) =31673619a(16) =60993464a(17) =115221230a(18) =213437204a(19) =387765033a(20) =691277518a(21) =1210138735a(22) =2081956120a(23) =3523173264
External references
- oeis: A259012