Number of nX3 0..1 arrays avoiding 0 0 1 horizontally and 0 1 1 vertically.
A206780
Number of nX3 0..1 arrays avoiding 0 0 1 horizontally and 0 1 1 vertically.
Terms
- a(0) =7a(1) =49a(2) =230a(3) =1020a(4) =4120a(5) =16109a(6) =61003a(7) =227197a(8) =834806a(9) =3041436a(10) =11009856a(11) =39680145a(12) =142545383a(13) =510891025a(14) =1827957230a(15) =6532356532a(16) =23322885552a(17) =83216416445a(18) =296774223739
External references
- oeis: A206780