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A318778 Number of different positions that an elementary sphinx can occupy in a sphinx of order n. 1
1, 28, 128, 300, 544, 860, 1248, 1708, 2240, 2844 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
Conjectures from Colin Barker, Nov 13 2018: (Start)
G.f.: x*(1 + 25*x + 47*x^2 - x^3) / (1 - x)^3.
a(n) = 44 - 80*n + 36*n^2 for n>1.
a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3) for n>4.
(End)
CROSSREFS
Sequence in context: A327750 A044360 A044741 * A184679 A123376 A192796
KEYWORD
nonn,more
AUTHOR
Craig Knecht, Sep 10 2018
STATUS
approved

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Last modified March 29 03:51 EDT 2024. Contains 371264 sequences. (Running on oeis4.)