Numbers k such that the concatenation of k with k-4 gives a square.
A115432
Numbers k such that the concatenation of k with k-4 gives a square.
Terms
- a(0) =65a(1) =6653a(2) =9605a(3) =218413a(4) =283720a(5) =996005a(6) =58446925a(7) =99960005a(8) =6086712229a(9) =7385370133a(10) =8478948853a(11) =9999600005a(12) =120178240093a(13) =161171620229a(14) =358247912200a(15) =426843573160a(16) =893417179213a(17) =999996000005
External references
- oeis: A115432