Number of (n+2) X (5+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.
A252111
Number of (n+2) X (5+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) =1884a(1) =624a(2) =1258a(3) =1956a(4) =3528a(5) =6070a(6) =11760a(7) =21344a(8) =39200a(9) =80832a(10) =147840a(11) =276160a(12) =593664a(13) =1091072a(14) =2059520a(15) =4537344a(16) =8361984a(17) =15877120a(18) =35450880a(19) =65429504a(20) =124620800a(21) =280215552a(22) =517570560a(23) =987381760a(24) =2228158464a(25) =4117102592
External references
- oeis: A252111