Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.
A252146
Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.
Terms
- a(0) =24855a(1) =7997a(2) =8964a(3) =11662a(4) =16958a(5) =24112a(6) =34320a(7) =50514a(8) =77490a(9) =109924a(10) =171154a(11) =246314a(12) =374956a(13) =548398a(14) =851976a(15) =1239416a(16) =1947846a(17) =2846434a(18) =4448414a(19) =6528938a(20) =10282258a(21) =15052762a(22) =23850504a(23) =35046680a(24) =55444962a(25) =81645260a(26) =129689058
External references
- oeis: A252146