Number of (n+1) X 2 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.
A206087
Number of (n+1) X 2 0..2 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.
Terms
- a(0) =81a(1) =270a(2) =972a(3) =3564a(4) =13608a(5) =52812a(6) =205416a(7) =803844a(8) =3153816a(9) =12375180a(10) =48598056a(11) =190924452a(12) =750064536a(13) =2947003884a(14) =11579514408a(15) =45498547908a(16) =178776400536a(17) =702469087308
External references
- oeis: A206087