Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 2 3 4 6 or 7.
A252275
Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 2 3 4 6 or 7.
Terms
- a(0) =535a(1) =2154a(2) =7803a(3) =15739a(4) =67509a(5) =257064a(6) =518498a(7) =2242108a(8) =8653976a(9) =17431304a(10) =75799154a(11) =294537559a(12) =592661533a(13) =2585522047a(14) =10081877314a(15) =20274600220a(16) =88602194170a(17) =346116811314a(18) =695822617360
External references
- oeis: A252275