Number of polygonal numbers which are n-digit repdigits.

Terms

a(0) =17a(1) =27a(2) =32a(3) =28a(4) =26a(5) =37a(6) =26a(7) =29a(8) =35a(9) =28a(10) =27a(11) =38a(12) =29a(13) =29a(14) =34a(15) =33a(16) =26a(17) =37a(18) =26a(19) =31a(20) =35a(21) =27a(22) =26a(23) =36a(24) =27a(25) =31a(26) =36a(27) =29a(28) =28a(29) =37