A026115 a(n) = T(2n,n-1), where T is the array defined in A026105.

1, 3, 15, 77, 413, 2266, 12636, 71290, 405790, 2325923, 13406666, 77632590, 451270925, 2631763500, 15391191315, 90230338449, 530098757210, 3120158068370, 18395925762046, 108621483748778, 642235028537889, 3801900814767378, 22531392119093175, 133663824177577317

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Crossrefs

Cf. A026105.

Extensions

More terms from Sean A. Irvine, Sep 16 2019