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A192668 Floor-Sqrt transform of hyperfactorials (A002109). 0
1, 1, 1, 3, 16, 185, 4988, 354134, 71109667, 42836123450, 81600285441318, 515548511098996334, 11283348939893661586501, 890385701589932763452676123, 262895016275494870674135139820802, 300629890583706167610723324054426034948 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

REFERENCES

Mohammad K. Azarian, On the Hyperfactorial Function, Hypertriangular Function, and the Discriminants of Certain Polynomials, International Journal of Pure and Applied Mathematics, Vol. 36, No. 2, 2007, pp. 251-257.  Mathematical Reviews, MR2312537.  Zentralblatt MATH, Zbl 1133.11012.

LINKS

Table of n, a(n) for n=0..15.

FORMULA

a(n) = floor(sqrt(product(k!,k=0..n))).

MATHEMATICA

Table[Floor[Sqrt[Product[k!, {k, 0, n}]]], {n, 0, 18}]

PROG

(Maxima) makelist(floor(sqrt(product(k!, k, 0, n))), n, 0, 12);

CROSSREFS

Sequence in context: A152554 A254430 A180721 * A045990 A007006 A174137

Adjacent sequences:  A192665 A192666 A192667 * A192669 A192670 A192671

KEYWORD

nonn

AUTHOR

Emanuele Munarini, Jul 07 2011

STATUS

approved

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Last modified August 11 23:45 EDT 2020. Contains 336434 sequences. (Running on oeis4.)