Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A253834
Number of (n+2)X(1+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =512a(1) =2440a(2) =8392a(3) =28540a(4) =91296a(5) =263476a(6) =709704a(7) =1850176a(8) =4685448a(9) =11503856a(10) =27555888a(11) =64844988a(12) =150302032a(13) =343468420a(14) =775467312a(15) =1733465848a(16) =3842018112a(17) =8449339760a(18) =18454984816a(19) =40069666364a(20) =86552091560a(21) =186078959996
External references
- oeis: A253834