Number of 3Xn 0..2 arrays with no element equal to any value at offset (0,-2) (-1,-2) or (-2,-1) and new values introduced in order 0..2.

A275091

Number of 3Xn 0..2 arrays with no element equal to any value at offset (0,-2) (-1,-2) or (-2,-1) and new values introduced in order 0..2.

Terms

    a(0) =5a(1) =81a(2) =192a(3) =508a(4) =1680a(5) =5304a(6) =17184a(7) =54484a(8) =176736a(9) =566532a(10) =1831420a(11) =5898428a(12) =19030840a(13) =61351112a(14) =197821048a(15) =637917924a(16) =2056541796a(17) =6631985064a(18) =21381565940a(19) =68947715488a(20) =222300888872a(21) =716808527616

External references