login
A159729
Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 3 local maxima.
1
0, 24, 13896, 3347088, 595973360, 93992305032, 14015268159704, 2027725518697376, 287867804621478048, 40320948446041301720, 5589326195307268168392, 768314046269046341078064, 104876358654665681729030736, 14230976452809572524526026408, 1921184312523441298037576065080
OFFSET
1,2
LINKS
PROG
(PARI) \\ CircPeaksBySig defined in A334778.
a(n) = {CircPeaksBySig(vector(n, i, 4), [3])[1]} \\ Andrew Howroyd, May 14 2020
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 20 2009
EXTENSIONS
Terms a(7) and beyond from Andrew Howroyd, May 14 2020
STATUS
approved