Number of (n+2) X (3+2) 0..3 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 2 3 4 6 or 7.
A252264
Number of (n+2) X (3+2) 0..3 arrays with every 3 X 3 subblock row, column, diagonal and antidiagonal sum not equal to 2 3 4 6 or 7.
Terms
- a(0) =258a(1) =822a(2) =3016a(3) =10302a(4) =35486a(5) =122506a(6) =420420a(7) =1446744a(8) =4990438a(9) =17183040a(10) =59122262a(11) =203560110a(12) =701041422a(13) =2413836036a(14) =8310468310a(15) =28613117804a(16) =98520290558a(17) =339220390780
External references
- oeis: A252264