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A051418 Square of LCM of {1, 2, ..., n}. 4
1, 4, 36, 144, 3600, 3600, 176400, 705600, 6350400, 6350400, 768398400, 768398400, 129859329600, 129859329600, 129859329600, 519437318400, 150117385017600, 150117385017600, 54192375991353600, 54192375991353600, 54192375991353600, 54192375991353600 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Least common multiples (or LCM) of {1, 4, 9, 16 ...,n^2}.

LINKS

T. D. Noe, Table of n, a(n) for n=1..200

Jon T. Butler, Tsutomu Sasao, Realizing all Index Generation Functions by the Row-Shift Method, IEEE 49th International Symposium on Multiple-Valued Logic (ISMVL 2019).

Index entries for sequences related to lcm's

FORMULA

a(n) = A003418(n)^2.

EXAMPLE

a(5) = lcm {1, 4, 9, 16, 25} = 3600.

MATHEMATICA

Table[LCM@@Range[n], {n, 20}]^2  (* Harvey P. Dale, Mar 28 2011 *)

CROSSREFS

Cf. A003418.

Sequence in context: A068589 A120077 A007407 * A069046 A065886 A069053

Adjacent sequences:  A051415 A051416 A051417 * A051419 A051420 A051421

KEYWORD

easy,nice,nonn

AUTHOR

Asher Auel (asher.auel(AT)reed.edu)

STATUS

approved

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Last modified May 17 12:01 EDT 2021. Contains 343971 sequences. (Running on oeis4.)