|
|
A159726
|
|
Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 6 local maxima.
|
|
1
|
|
|
0, 0, 0, 1256, 24483200, 55067152128, 57615626479712, 41069543783239872, 23516539818144774912, 11776285299306762639680, 5412720242324956991133440, 2351154988094363114287766016, 983075755980176565659196488192, 400400884398187607904444939190272
(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), [6])[1]} \\ Andrew Howroyd, May 14 2020
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|