A026095 a(n) = Sum{T(k,k-1)}, k = 1,2,...,n, where T is the array defined in A026082.

1, 3, 6, 9, 22, 55, 153, 431, 1235, 3555, 10278, 29793, 86562, 251983, 734776, 2145825, 6275148, 18373299, 53856156, 158025189, 464112300, 1364247183, 4013353935, 11815188003, 34807249137, 102606325139, 302646363728, 893175905781

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Crossrefs

Equals A024998(n) + 3, n>1.