a(1) = 1; thereafter a(n) = smallest number > a(n-1) such that the concatenation of a(n-1) and a(n) is a square.
A090566
a(1) = 1; thereafter a(n) = smallest number > a(n-1) such that the concatenation of a(n-1) and a(n) is a square.
Terms
- a(0) =1a(1) =6a(2) =25a(3) =281a(4) =961a(5) =6201a(6) =59409a(7) =187600a(8) =730641a(9) =4429444a(10) =28600025a(11) =85336064a(12) =468650384a(13) =4590568025a(14) =23901253604a(15) =36922256164a(16) =228378872384a(17) =519390415729
External references
- oeis: A090566