Nonnegative numbers k not ending in 0 such that, in decimal representation, the subsequence of digits of k^2 occupying an odd position is equal to the digits of k.
A362020
Nonnegative numbers k not ending in 0 such that, in decimal representation, the subsequence of digits of k^2 occupying an odd position is equal to the digits of k.
Terms
- a(0) =1a(1) =5a(2) =6a(3) =11a(4) =76a(5) =105a(6) =501a(7) =505a(8) =506a(9) =605a(10) =756a(11) =826a(12) =1001a(13) =5941a(14) =10005a(15) =10505a(16) =12731a(17) =13921a(18) =50001a(19) =50005a(20) =50006a(21) =50105a(22) =50501a(23) =50505a(24) =50506a(25) =50605a(26) =60005a(27) =60505a(28) =88705a(29) =100001
External references
- oeis: A362020