Number of n X 3 arrays containing 3 copies of 0..n-1 with every element equal to at least one vertical or antidiagonal neighbor and the top left element equal to 0.
A268157
Number of n X 3 arrays containing 3 copies of 0..n-1 with every element equal to at least one vertical or antidiagonal neighbor and the top left element equal to 0.
Terms
- a(0) =0a(1) =1a(2) =8a(3) =36a(4) =456a(5) =6360a(6) =93600a(7) =1784160a(8) =38102400a(9) =899579520a(10) =23960966400a(11) =699741504000
External references
- oeis: A268157