Number of (n+2)X(7+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.
A254844
Number of (n+2)X(7+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) =794128a(1) =1323795a(2) =1795490a(3) =3986282a(4) =7695684a(5) =15676281a(6) =29838772a(7) =55992976a(8) =100413564a(9) =176175692a(10) =297995148a(11) =493162840a(12) =792361276a(13) =1249168284a(14) =1921781524a(15) =2908426536a(16) =4313307192a(17) =6311925400a(18) =9077791868a(19) =12909434532a(20) =18083815180
External references
- oeis: A254844