Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7.
A252413
Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7.
Terms
- a(0) =964a(1) =5061a(2) =20998a(3) =44456a(4) =249530a(5) =1068295a(6) =2289969a(7) =12895653a(8) =55487440a(9) =119202170a(10) =674431408a(11) =2912481205a(12) =6264133843a(13) =35589145875a(14) =154113611916a(15) =331758653516
External references
- oeis: A252413