59508domain: NAppears in sequencesPerimeter (rounded down) of a tetraflake-like fractal after n iterations, a(1) = 1 (see comments).at n=24A235648Number of (n+1) X (4+1) 0..2 arrays colored with the upper median value of each 2 X 2 subblock.at n=11A235950First elements of maximal isospectral chains of length 3.at n=7A335082