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A329195 a(n) = floor(log_5(n^2)) = floor(2 log_5(n)). 1

%I #8 Aug 01 2023 17:45:36

%S 0,0,1,1,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,

%T 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,

%U 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5

%N a(n) = floor(log_5(n^2)) = floor(2 log_5(n)).

%t Table[Floor[2Log[5,n]],{n,100}] (* _Harvey P. Dale_, Dec 14 2021 *)

%o (PARI) apply( A329195(n)=logint(n^2,5), [1..99])

%Y Cf. A000290 (n^2), A062153 (log_3), A329202 (log_2(n^2)), A329193 (log_2(n^3)), A329194 (log_3(n^2)).

%K nonn

%O 1,5

%A _M. F. Hasler_, Nov 07 2019

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