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

0,1

Links

Table of n, a(n) for n=0..19.

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.

Formula

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

Crossrefs

Cf. A278612, A278614, A278615, A278616.

Sequence in context: A084625 A088305 A001906 * A072632 A001671 A360054

Adjacent sequences: A278610 A278611 A278612 * A278614 A278615 A278616

Keyword

nonn,more

Author

Ilya Amburg, Nov 23 2016

Extensions

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

Status

approved