Number of (4+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7.
A252644
Number of (4+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7.
Terms
- a(0) =2230a(1) =10259a(2) =39492a(3) =95904a(4) =448323a(5) =1848350a(6) =4416767a(7) =21690676a(8) =92632549a(9) =215263202a(10) =1102681029a(11) =4817209197a(12) =10969594133a(13) =57815579003a(14) =256126895043a(15) =575854261780
External references
- oeis: A252644