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A165344 Second series of Hankel determinants based on A001044(n+1)=((n+1)!)^2 : a(n)=det(A001044(i+j-1))=det(((i+j-1)!)^2), i,j=1,2...n. Hankel transform of A001044(n+1). 2
1, 20, 75456, 222049714176, 1446859308630697574400, 47680530046593302430474043392000000, 15747911603441625571224989926437024694272000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

It would be highly desirable to obtain a closed form for a(n).

LINKS

Table of n, a(n) for n=0..6.

MATHEMATICA

nmax = 10; Table[Det[Table[((i+j-1)!)^2, {i, 1, k}, {j, 1, k}]], {k, 1, nmax}] (* Vaclav Kotesovec, Feb 24 2019 *)

CROSSREFS

Sequence in context: A159370 A129039 A129038 * A348646 A222745 A175853

Adjacent sequences:  A165341 A165342 A165343 * A165345 A165346 A165347

KEYWORD

nonn

AUTHOR

Karol A. Penson, Sep 15 2009

STATUS

approved

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Last modified August 19 23:59 EDT 2022. Contains 356231 sequences. (Running on oeis4.)