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A272238 a(n) = Product_{k=0..n} (n^2+k)!. 4
1, 2, 2073600, 25177856146146034974720000000, 14100949826093501607549529280892932893801777581548587107609477120000000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The next term has 173 digits.

LINKS

Table of n, a(n) for n=0..4.

FORMULA

a(n) = ((n^2+n)!)^(n+1) / A272237(n).

a(n) ~ exp(11/24 + n/6 - n^2 - n^3) * n^((1+n)*(1 + n + 2*n^2)) * (2*Pi)^((n+1)/2).

MATHEMATICA

Table[Product[(n^2+k)!, {k, 0, n}], {n, 0, 6}]

Table[BarnesG[n^2 + n + 2]/BarnesG[n^2 + 1], {n, 0, 6}]

CROSSREFS

Cf. A135860, A272164, A272180, A272237, A272241.

Sequence in context: A303433 A253264 A124368 * A303255 A322096 A037051

Adjacent sequences:  A272235 A272236 A272237 * A272239 A272240 A272241

KEYWORD

nonn,easy

AUTHOR

Vaclav Kotesovec, Apr 23 2016

STATUS

approved

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Last modified October 22 13:19 EDT 2019. Contains 328318 sequences. (Running on oeis4.)