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

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, 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, 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

Offset

1,5

Links

Table of n, a(n) for n=1..99.

Mathematica

Table[Floor[2Log[5, n]], {n, 100}] (* Harvey P. Dale, Dec 14 2021 *)

Prog

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

Crossrefs

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

Sequence in context: A055980 A076080 A134914 * A204164 A257639 A180447

Adjacent sequences: A329192 A329193 A329194 * A329196 A329197 A329198

Keyword

nonn

Author

M. F. Hasler, Nov 07 2019

Status

approved