Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.
A252113
Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.
Terms
- a(0) =2468a(1) =1180a(2) =2476a(3) =4488a(4) =11760a(5) =17772a(6) =33216a(7) =84864a(8) =142176a(9) =265728a(10) =678912a(11) =1137408a(12) =2125824a(13) =5431296a(14) =9099264a(15) =17006592a(16) =43450368a(17) =72794112a(18) =136052736a(19) =347602944a(20) =582352896a(21) =1088421888a(22) =2780823552a(23) =4658823168a(24) =8707375104
External references
- oeis: A252113