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A334775
Number of permutations of 2 indistinguishable copies of 1..n with exactly n local maxima.
4
1, 3, 24, 339, 7392, 230217, 9689934, 529634931, 36463272996, 3086776079745, 315108659732034, 38170141911313467, 5412679282489599840, 888197438344278978537, 166988574370806672234630, 35659091146526471860555587, 8583030980293328579564829948, 2312892203852608268226402385617
OFFSET
1,2
LINKS
PROG
(PARI) \\ PeaksBySig defined in A334774.
a(n)={ PeaksBySig(vector(n, i, 2), [n-1])[1] }
CROSSREFS
Main diagonal of A334774.
Sequence in context: A370055 A371007 A144003 * A153389 A366000 A375800
KEYWORD
nonn
AUTHOR
Andrew Howroyd, May 11 2020
STATUS
approved