Kaprekar numbers that are the concatenation of two consecutive numbers.

Terms

a(0) =45a(1) =2223a(2) =2728a(3) =4950a(4) =148149a(5) =351352a(6) =499500a(7) =11111112a(8) =38883889a(9) =49995000a(10) =63636364a(11) =74747475a(12) =75247525a(13) =86358636a(14) =4756047561a(15) =4999950000a(16) =5867158672a(17) =6111061111a(18) =8888888889a(19) =9132791328a(20) =104247104248a(21) =164983164984a(22) =178321178322a(23) =195156195157a(24) =230769230770a(25) =269230269231