Number of n X 4 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 0 vertically.
A207770
Number of n X 4 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 0 vertically.
Terms
- a(0) =10a(1) =100a(2) =292a(3) =828a(4) =2514a(5) =7164a(6) =20104a(7) =57458a(8) =165182a(9) =475522a(10) =1374786a(11) =3988072a(12) =11586166a(13) =33700098a(14) =98126672a(15) =285904744a(16) =833354524a(17) =2429866940a(18) =7086585498a(19) =20670718296a(20) =60300595980a(21) =175923202614a(22) =513272786306
External references
- oeis: A207770