Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock sum of the four sums of the central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically.
A254564
Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock sum of the four sums of the central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically.
Terms
- a(0) =37200a(1) =183210a(2) =978154a(3) =2148260a(4) =4796417a(5) =12136355a(6) =25618602a(7) =56219231a(8) =118029035a(9) =245830679a(10) =490847254a(11) =974839744a(12) =1887834479a(13) =3581112558a(14) =6699292579a(15) =12319163671a(16) =22287681131a(17) =39795975182a(18) =70067976674a(19) =121758652567
External references
- oeis: A254564