Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7.
A252531
Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7.
Terms
- a(0) =1200a(1) =1468a(2) =2404a(3) =3160a(4) =11456a(5) =19232a(6) =25280a(7) =91648a(8) =153856a(9) =202240a(10) =733184a(11) =1230848a(12) =1617920a(13) =5865472a(14) =9846784a(15) =12943360a(16) =46923776a(17) =78774272a(18) =103546880a(19) =375390208a(20) =630194176a(21) =828375040a(22) =3003121664a(23) =5041553408a(24) =6627000320
External references
- oeis: A252531