102125domain: NAppears in sequencesGaps of 4 in sequence A038593 (upper terms).at n=6A038648The sequence is a lattice filling using the exponential "E" constant digits base ten.at n=4A152182Number of (n+3) X 9 0..2 matrices with each 4 X 4 subblock idempotent.at n=15A224726