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%I #9 May 20 2020 02:55:20
%S 1,9,195,7140,396900,31185000,3291888600,449513064000,77111922888000,
%T 16235185926960000,4116213602701200000,1237059394731800640000,
%U 434864246413372776000000,176784623645708110032000000,82297894534015170170160000000,43496460979945066988294400000000
%N Total number of local maxima in all permutations of 2 indistinguishable copies of 1..n.
%H Andrew Howroyd, <a href="/A334777/b334777.txt">Table of n, a(n) for n = 1..100</a>
%F a(n) = Sum_{k=1..n} k*A334774(n,k).
%F a(n) = A334776(n) + A000680(n).
%o (PARI) \\ PeaksBySig defined in A334774.
%o a(n)={my(u=PeaksBySig(vector(n,i,2), [0..n-1])); sum(k=1, #u, k*u[k])}
%Y Cf. A000680, A334774, A334775, A334776.
%K nonn
%O 1,2
%A _Andrew Howroyd_, May 12 2020
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