Numbers k such that k^7 starts with k itself (in base 10).

Terms

a(0) =0a(1) =1a(2) =10a(3) =100a(4) =1000a(5) =6813a(6) =10000a(7) =14678a(8) =46416a(9) =100000a(10) =146780a(11) =464159a(12) =1000000a(13) =4641589a(14) =10000000a(15) =21544347a(16) =68129207a(17) =100000000a(18) =1000000000a(19) =10000000000a(20) =100000000000a(21) =316227766017a(22) =681292069058a(23) =1000000000000