Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 4 5 or 7 and every diagonal and antidiagonal sum 2 4 5 or 7.
A251875
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 4 5 or 7 and every diagonal and antidiagonal sum 2 4 5 or 7.
Terms
- a(0) =32372a(1) =99808a(2) =40816a(3) =62720a(4) =267872a(5) =506656a(6) =893120a(7) =3499888a(8) =8000000a(9) =15317248a(10) =56450688a(11) =146923792a(12) =294439232a(13) =1049159568a(14) =2916709968a(15) =5965120064a(16) =20941831888a(17) =59901392016a(18) =123522690880a(19) =431054317328
External references
- oeis: A251875