

A278613


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


4



3, 8, 21, 55, 145, 381, 1001, 2633, 6921, 18193, 47833, 125745, 330569, 869057, 2284665, 6006193, 15789865, 41510241, 109127129, 286886801
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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. NeumannChun, S. Peluse, M. Stoffregen, Stern Sequences for a Family of Multidimensional Continued Fractions: TRIPStern Sequences, arXiv:1509.05239 [math.CO], 17 Sep 2015.


FORMULA

Conjecture: G.f.: ( 35*x7*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 A309226
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



