A026131 a(n) = T(2n,n-2), where T is the array in A026120.

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

Links

Table of n, a(n) for n=1..24.

Crossrefs

Cf. A026120, A026128, A026132.

Sequence in context: A030983 A069429 A275402 * A026160 A025187 A151328

Adjacent sequences: A026128 A026129 A026130 * A026132 A026133 A026134

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms and title corrected by Sean A. Irvine, Sep 17 2019

Status

approved