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A078491 a(n) = lcm(1..Catalan(n)). 4
1, 1, 2, 60, 360360, 219060189739591200, 1749342047920660916901891145781670987072592322134428432000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

For every cycle count LCM-sequence Axxxxxx in A073204 it holds that Axxxxxx(n) divides a(n). And this also applies to similar LCM-sequences induced by other "Catalan bijections", cf. A060113.

LINKS

Muniru A Asiru, Table of n, a(n) for n = 0..7

Index entries for sequences related to lcm's

FORMULA

a(n) = A003418(A000108(n)).

PROG

(PARI) a(n) = lcm([1..binomial(2*n, n)/(n+1)]); \\ Michel Marcus, Mar 21 2018

(GAP) List([0..7], n->Lcm([1..Binomial(2*n, n)/(n+1)])); # Muniru A Asiru, Mar 21 2018

CROSSREFS

Composition of the sequences A000108 and A003418.

Sequence in context: A078423 A231024 A121493 * A182856 A101896 A130411

Adjacent sequences:  A078488 A078489 A078490 * A078492 A078493 A078494

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jan 04 2003

STATUS

approved

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Last modified June 23 13:59 EDT 2021. Contains 345402 sequences. (Running on oeis4.)