Triangular numbers composed of digits {3,4,5}.

Terms

a(0) =3a(1) =45a(2) =55a(3) =435a(4) =34453a(5) =455535a(6) =3355345a(7) =3544453a(8) =45453345a(9) =334434453a(10) =355444453a(11) =3433345545a(12) =4544333445a(13) =5435334453a(14) =35554444453a(15) =44555453355