73252domain: NAppears in sequencesNumber of binary words of length n in which the ones occur only in blocks of length at least 4.at n=28A005253Expansion of 1/(1 - x^2/(1-x)^5).at n=12A369803Expansion of (1 + x)^2/(1 - x^2*(1 + x)^3).at n=18A375317