Number of polygonal numbers which are repdigits with <= n digits.

Terms

a(0) =17a(1) =44a(2) =76a(3) =104a(4) =130a(5) =167a(6) =193a(7) =222a(8) =257a(9) =285a(10) =312a(11) =350a(12) =379a(13) =408a(14) =442a(15) =475a(16) =501a(17) =538a(18) =564a(19) =595a(20) =630a(21) =657a(22) =683a(23) =719a(24) =746a(25) =777a(26) =813a(27) =842a(28) =870a(29) =907