Right-angled numbers with an internal digit as the vertex.

Terms

a(0) =101a(1) =121a(2) =212a(3) =232a(4) =323a(5) =343a(6) =434a(7) =454a(8) =545a(9) =565a(10) =656a(11) =676a(12) =767a(13) =787a(14) =878a(15) =898a(16) =989a(17) =1012a(18) =1210a(19) =1232a(20) =2101a(21) =2123a(22) =2321a(23) =2343a(24) =3212a(25) =3234a(26) =3432a(27) =3454a(28) =4323a(29) =4345