Number of (n+2)X(1+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.
A254561
Number of (n+2)X(1+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) =512a(1) =2384a(2) =10240a(3) =37200a(4) =116056a(5) =358324a(6) =1029664a(7) =2800912a(8) =7536024a(9) =19539824a(10) =49071028a(11) =122137716a(12) =297265144a(13) =708589765a(14) =1676189792a(15) =3907023789a(16) =8978272228a(17) =20497994769a(18) =46321914076a(19) =103638618227a(20) =230617227832a(21) =509410016859
External references
- oeis: A254561