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A118381 Largest 3-smooth number dividing n!. 2
1, 2, 6, 24, 24, 144, 144, 1152, 10368, 20736, 20736, 248832, 248832, 497664, 1492992, 23887872, 23887872, 429981696, 429981696, 1719926784, 5159780352, 10319560704, 10319560704, 247669456896, 247669456896, 495338913792, 13374150672384, 53496602689536, 53496602689536 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..1861 (terms below 10^1000)

Index entries for sequences related to factorial numbers.

FORMULA

a(n) = A060818(n) * A060828(n).

MATHEMATICA

s[n_, b_] := Sum[IntegerExponent[k, b], {k, 1, n}]; a[n_] := 2^s[n, 2] * 3^s[n, 3]; Array[a, 30] (* Amiram Eldar, Jan 29 2020 *)

CROSSREFS

Cf. A003586, A000142, A011371, A054861, A060818, A060828.

Sequence in context: A068819 A060068 A099732 * A123145 A232981 A304039

Adjacent sequences:  A118378 A118379 A118380 * A118382 A118383 A118384

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 16 2006

EXTENSIONS

More terms from Amiram Eldar, Jan 29 2020

STATUS

approved

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Last modified July 12 09:35 EDT 2020. Contains 335657 sequences. (Running on oeis4.)