194458domain: NAppears in sequencesNumber of ways to tile a 5 X 2n room with 1x2 Tatami mats. At most 3 Tatami mats may meet at a point.at n=43A068924Number of binary strings of length n with no substrings equal to 0001 or 0100.at n=21A164394The Padovan sequence A000931 doubled.at n=47A291289