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A135916 (n^4 - 10*n^2 + 15*n - 6)/2. +0
1
0, 0, 15, 75, 222, 510, 1005, 1785, 2940, 4572, 6795, 9735, 13530, 18330, 24297, 31605, 40440, 51000, 63495, 78147, 95190, 114870, 137445, 163185, 192372, 225300, 262275, 303615, 349650, 400722, 457185, 519405, 587760, 662640, 744447, 833595, 930510 (list; graph; listen)
OFFSET

1,3

REFERENCES

Ellingsrud, Geir and Stromme, Stein Arild, Bott's formula and enumerative geometry. J. Amer. Math. Soc. 9 (1996), 175-193. [arXiv:alg-geom/9411005]

CROSSREFS

Sequence in context: A080841 A022675 A116632 this_sequence A051880 A007328 A049391

Adjacent sequences: A135913 A135914 A135915 this_sequence A135917 A135918 A135919

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Mar 07 2008

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.


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