A278613 Sum of terms in level n of TRIP - Stern sequence associated with permutation triple (e,e,132).

3, 8, 21, 55, 145, 381, 1001, 2633, 6921, 18193, 47833, 125745, 330569, 869057, 2284665, 6006193, 15789865, 41510241, 109127129, 286886801

Offset: 0

Author

Ilya Amburg, Nov 23 2016

Keywords

• nonn
• more

Links

• I. Amburg, K. Dasaratha, L. Flapan, T. Garrity, C. Lee, C. Mihailak, N. Neumann-Chun, S. Peluse, M. Stoffregen, Stern Sequences for a Family of Multidimensional Continued Fractions: TRIP-Stern Sequences, arXiv:1509.05239 [math.CO], 17 Sep 2015.

Crossrefs

Cf. A278612, A278614, A278615, A278616.

Formula

Conjecture: G.f.: ( -3-5*x-7*x^2 ) / ( -1+x+2*x^2+6*x^3 ). - R. J. Mathar, Dec 02 2016

Extensions

New offset and a(10)-a(19) from R. J. Mathar, Dec 02 2016