Number of n X 3 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically.
A206866
Number of n X 3 0..1 arrays avoiding 0 0 0 horizontally and 1 0 1 vertically.
Terms
- a(0) =7a(1) =49a(2) =211a(3) =889a(4) =3967a(5) =17737a(6) =78799a(7) =350017a(8) =1555843a(9) =6915889a(10) =30739447a(11) =136629265a(12) =607288711a(13) =2699272273a(14) =11997693379a(15) =53327205481a(16) =237028156975
External references
- oeis: A206866