Number of n X 3 0..1 arrays avoiding 0 0 0 horizontally and 1 1 1 vertically.
A206989
Number of n X 3 0..1 arrays avoiding 0 0 0 horizontally and 1 1 1 vertically.
Terms
- a(0) =7a(1) =49a(2) =174a(3) =840a(4) =3858a(5) =17460a(6) =80070a(7) =365784a(8) =1670838a(9) =7636416a(10) =34893438a(11) =159444240a(12) =728589330a(13) =3329288484a(14) =15213221238a(15) =69517022592a(16) =317658800982
External references
- oeis: A206989