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%I #24 Nov 20 2021 11:36:01
%S 7,83,937,9417,94863,987917,9893887,99483667,994927133,9486778167,
%T 99497231067,999949483667,9892825177313
%N a(n) is the largest n-digit number whose square has a digital sum equal to A348300(n).
%t Array[#1 + Position[#2, Max[#2]][[-1, -1]] - 1 & @@ {#1, Map[Total@ IntegerDigits[#^2] &, Range[#1, #2]]} & @@ {10^(# - 1), 10^# - 1} &, 8] (* _Michael De Vlieger_, Oct 12 2021 *)
%Y Cf. A004159, A348300.
%K nonn,base,more
%O 1,1
%A _Bernardo Recamán_ and _Freddy Barrera_, Oct 10 2021
%E a(11) from _Chai Wah Wu_, Nov 18 2021
%E a(12)-a(13) from _Martin Ehrenstein_, Nov 20 2021