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A278613 Sum of terms in level n of TRIP -  Stern sequence associated with permutation triplet (e,e,132). 4
3, 8, 21, 55, 145, 381, 1001, 2633, 6921, 18193, 47833, 125745, 330569, 869057, 2284665, 6006193, 15789865, 41510241, 109127129, 286886801 (list; graph; refs; listen; history; text; internal format)
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 A278616

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

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Last modified February 24 05:48 EST 2018. Contains 299597 sequences. (Running on oeis4.)