Giza numbers.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =121a(10) =232a(11) =343a(12) =454a(13) =565a(14) =676a(15) =787a(16) =898a(17) =12321a(18) =23432a(19) =34543a(20) =45654a(21) =56765a(22) =67876a(23) =78987a(24) =1234321a(25) =2345432a(26) =3456543a(27) =4567654a(28) =5678765a(29) =6789876