|
|
A159725
|
|
Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 5 local maxima.
|
|
1
|
|
|
0, 0, 0, 45888, 72621240, 44981038296, 18389612809680, 6040299916376448, 1749772454946512832, 469799260595276780160, 120267085682566659944448, 29853755210933389459501056, 7260112922454133870956552192, 1740894557985015492853351907328, 413292356519150082930093737902080
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,4
|
|
LINKS
|
|
|
PROG
|
(PARI) \\ CircPeaksBySig defined in A334778.
a(n) = {CircPeaksBySig(vector(n, i, 3), [5])[1]} \\ Andrew Howroyd, May 14 2020
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|