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A026131
a(n) = T(2n,n-2), where T is the array in A026120.
1
1, 3, 16, 84, 458, 2541, 14286, 81103, 463913, 2669576, 15437366, 89633392, 522223740, 3051529665, 17876415654, 104955553899, 617415739622, 3638327064022, 21473223755896, 126910074421985, 751000070996514, 4449166010804565, 26385683227918794, 156628589801790627
OFFSET
1,2
CROSSREFS
KEYWORD
nonn
EXTENSIONS
More terms and title corrected by Sean A. Irvine, Sep 17 2019
STATUS
approved