n times n+9 gives the concatenation of two numbers m and m-8.

Terms

a(0) =93a(1) =454a(2) =538a(3) =993a(4) =7664a(5) =9993a(6) =72720a(7) =99993a(8) =356428a(9) =643564a(10) =999993a(11) =9090909a(12) =9999993a(13) =35294117a(14) =64705875a(15) =99999993a(16) =335664328a(17) =664335664a(18) =684210519a(19) =818181818a(20) =838056673a(21) =846153846a(22) =866028701a(23) =980125138a(24) =999999993