Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 1 0 vertically.
A208109
Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 1 0 vertically.
Terms
- a(0) =9a(1) =81a(2) =171a(3) =361a(4) =1805a(5) =9025a(6) =25555a(7) =72361a(8) =292941a(9) =1185921a(10) =3801699a(11) =12187081a(12) =45351581a(13) =168766081a(14) =570110035a(15) =1925893225a(16) =6923341485a(17) =24888533121a(18) =85943617731a(19) =296775442441
External references
- oeis: A208109