A026160 a(n) = T(2n,n-1), where T is the array in A026148.

1, 3, 16, 84, 459, 2552, 14377, 81768, 468468, 2699596, 15630384, 90853864, 529850815, 3098789865, 18167417169, 106738859744, 628304239266, 3704621197662, 21875951368671, 129352256646948, 765788776646355, 4538617746853905, 26926250088179529, 159892875661323312

Offset

1,2

Links

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

Crossrefs

Cf. A026148.

Sequence in context: A069429 A275402 A026131 * A025187 A151328 A277923

Adjacent sequences: A026157 A026158 A026159 * A026161 A026162 A026163

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Sep 18 2019

Status

approved