A026116 T(2n,n+1), where T is the array defined in A026105.

1, 7, 44, 259, 1509, 8767, 50973, 296907, 1733150, 10138970, 59435705, 349085651, 2053897585, 12103791975, 71432963850, 422138418075, 2497699796394, 14794839261958, 87725376843892, 520654743222562, 3092804089136541, 18386738886807495, 109390940367285906, 651267699186002859

Offset

1,2

Links

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

Crossrefs

Cf. A026105.

Sequence in context: A378165 A203210 A323923 * A216237 A291388 A037531

Adjacent sequences: A026113 A026114 A026115 * A026117 A026118 A026119

Keyword

nonn

Author

Clark Kimberling

Extensions

More terms from Sean A. Irvine, Sep 16 2019

Status

approved