A329202 - OEIS

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A329202

a(n) = floor(2*log_2(n)) = floor(log_2(n^2)).

0, 2, 3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..80.

PROG

(PARI) a(n)=logint(n^2, 2)

CROSSREFS

Cf. A017912, A328911 (has this as row lengths).

Sequence in context: A333262 A218767 A334863 * A318994 A261101 A327704

Adjacent sequences: A329199 A329200 A329201 * A329203 A329204 A329205

KEYWORD

nonn,easy

AUTHOR

M. F. Hasler, Nov 07 2019

STATUS

approved