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A282901
Number of permutations of 1,2,...,2n+1 obtainable via labeled chip-firing.
0
1, 3, 12, 54, 232
OFFSET
0,2
COMMENTS
It is conjectured that the permutations counted by a(n) have at most n inversions.
LINKS
S. Hopkins, T. McConville, and J. Propp, Sorting via chip-firing, arXiv: 1612.06816 [math.CO], 2017.
S. Hopkins, T. McConville, and J. Propp, Sorting via chip-firing, Electronic Journal of Combinatorics, 24, (2017), #P3.13.
EXAMPLE
For n=1 the a(1)=3 permutations are 123, 132, and 213.
CROSSREFS
Sequence in context: A370821 A329056 A191577 * A123348 A151204 A151205
KEYWORD
nonn,more
AUTHOR
James Propp, Feb 24 2017
STATUS
approved