A361525 - OEIS

%I #8 Mar 19 2023 08:29:20

%S 1,3,17,54,892,8159,80021,791821,7906439,79069308

%N Number of ways of dividing an n X 3 rectangle into integer-sided rectangles, up to rotations and reflections.

%F a(n) >= A208215(n)/4 for n != 3.

%F a(n) ~ A208215(n)/4.

%Y Third column of A361523.

%Y Cf. A208215 (rotations and reflections are considered distinct), A359019 (square pieces), A360632.

%K nonn,more

%O 0,2

%A _Pontus von Brömssen_, Mar 15 2023