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

Terms

a(0) =365a(1) =628a(2) =771a(3) =859a(4) =9043a(5) =81820a(6) =366328a(7) =633665a(8) =7272729a(9) =35294109a(10) =64705884a(11) =336663328a(12) =340080963a(13) =377622379a(14) =400178770a(15) =454545456a(16) =477101847a(17) =522898146a(18) =545454537a(19) =599821223a(20) =622377614a(21) =659919030a(22) =663336665