113598domain: NAppears in sequencesa(3) = 2, a(4) = 3; for n > 4, a(n) = {a(n-2)}+{a(n-1)}, where {a} means largest prime <= a.at n=24A065435Number of unimodal compositions of n where the maximal part appears three times.at n=42A226541Row lengths of irregular triangle A381587.at n=27A381357