Number of n X 4 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two no more than once.
A268624
Number of n X 4 0..2 arrays with some element plus some horizontally or vertically adjacent neighbor totalling two no more than once.
Terms
- a(0) =60a(1) =666a(2) =6300a(3) =55452a(4) =467190a(5) =3819654a(6) =30553014a(7) =240364746a(8) =1866503592a(9) =14342680944a(10) =109265781870a(11) =826421076378
External references
- oeis: A268624