login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A013630 Triangle of coefficients of polynomials arising as numerators of certain Hilbert series. 0
1, 1, 1, 1, 1, 8, 22, 8, 1, 1, 34, 295, 565, 295, 34, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

2,6

COMMENTS

The row 1,8,22,8,1 occurs on p. 78 of Ottaviani as the numerator for the Hilbert series of the invariant ring of eight ordered points in a projective space. -  Tom Copeland, Feb 27 2020

REFERENCES

D n Verma, Towards Classifying Finite Point-Set Configurations, preprint, 1997.

LINKS

Table of n, a(n) for n=2..17.

G. Ottaviani, Five lectures on projective invariants, arXiv preprint arXiv:1305.2749 [math.AG], 2013.

CROSSREFS

Sequence in context: A019281 A284737 A323593 * A215600 A304301 A236917

Adjacent sequences:  A013627 A013628 A013629 * A013631 A013632 A013633

KEYWORD

tabl,nonn,more

AUTHOR

N. J. A. Sloane

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 13 10:38 EDT 2020. Contains 335687 sequences. (Running on oeis4.)