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A013630 revision #27

A013630
Irregular triangle read by rows, giving coefficients of polynomials arising as numerators of certain Hilbert series.
1
1, 1, 1, 1, 1, 8, 22, 8, 1, 1, 34, 295, 565, 295, 34, 1
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
LINKS
G. Ottaviani, Five lectures on projective invariants, arXiv preprint arXiv:1305.2749 [math.AG], 2013.
D.-N. Verma, Towards Classifying Finite Point-Set Configurations, 1997, Unpublished. [Scanned copy of annotated version of preprint given to me by the author in 1997. - N. J. A. Sloane, Oct 04 2021]
EXAMPLE
Triangle begins:
1,
1, 1, 1,
1, 8, 22, 8, 1,
1, 34, 295, 565, 295, 34, 1,
...
CROSSREFS
Sequence in context: A019281 A284737 A323593 * A215600 A304301 A236917
KEYWORD
tabf,nonn,more
STATUS
reviewed