Number of n X 4 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.
A275561
Number of n X 4 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.
Terms
- a(0) =6a(1) =96a(2) =294a(3) =1176a(4) =4056a(5) =15000a(6) =54150a(7) =196566a(8) =714150a(9) =2589894a(10) =9405024a(11) =34129350a(12) =123887616a(13) =449661894a(14) =1632114294a(15) =5924052504a(16) =21502190976a(17) =78045783606a(18) =283279234776
External references
- oeis: A275561