Numbers k such that k^10 starts with k itself (in base 10).

Terms

a(0) =0a(1) =1a(2) =6a(3) =10a(4) =13a(5) =36a(6) =60a(7) =100a(8) =1000a(9) =10000a(10) =100000a(11) =129155a(12) =278256a(13) =1000000a(14) =10000000a(15) =21544347a(16) =100000000a(17) =1000000000a(18) =10000000000a(19) =59948425032a(20) =100000000000a(21) =599484250319a(22) =1000000000000