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A103574 Triangle read by rows giving number of pure shifted complexes in k dimensions on n nodes (n >= 1, 0 <= d <= n-1). 0
1, 1, 1, 1, 2, 1, 1, 4, 3, 1, 1, 8, 11, 4, 1, 1, 16, 50, 26, 5, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

REFERENCES

C. Klivans, Obstructions to shiftedness, Discrete Comput. Geom., 33 (2005), 535-545.

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

Triangle begins:

1

1 1

1 2 1

1 4 3 1

1 8 11 4 1

1 16 50 26 5 1

CROSSREFS

Sequence in context: A103323 A329332 A092056 * A112682 A033185 A217781

Adjacent sequences: A103571 A103572 A103573 * A103575 A103576 A103577

KEYWORD

nonn,tabl

AUTHOR

N. J. A. Sloane, Mar 23 2005

STATUS

approved

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Last modified February 2 17:16 EST 2023. Contains 360023 sequences. (Running on oeis4.)