Number of simple repdigit polyhedral numbers with <=n digits.

Terms

a(0) =15a(1) =36a(2) =57a(3) =81a(4) =102a(5) =124a(6) =148a(7) =172a(8) =194a(9) =218a(10) =239a(11) =261a(12) =285a(13) =309a(14) =331a(15) =356a(16) =377a(17) =399a(18) =423a(19) =448a(20) =471a(21) =495a(22) =516a(23) =538a(24) =563a(25) =587a(26) =609a(27) =634a(28) =655a(29) =677