OFFSET
0,2
COMMENTS
Sum of all third elements at level n of the TRIP-Stern sequence corresponding to the permutation triple (e,13,23)
LINKS
Ilya Amburg, Krishna Dasaratha, Laure Flapan, Thomas Garrity, Chansoo Lee, Cornelia Mihaila, Nicholas Neumann-Chun, Sarah Peluse, Matthew Stoffregen, Stern Sequences for a Family of Multidimensional Continued Fractions: TRIP-Stern Sequences, arXiv:1509.05239 [math.CO], 2015, Section 7.2.1
Index entries for linear recurrences with constant coefficients, signature (2,4,-6).
FORMULA
a(n) >= 2^n.
PROG
(PARI) x='x+O('x^99); Vec((1-2*x^2)/(1-2*x-4*x^2+6*x^3)) \\ Altug Alkan, Apr 16 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
R. J. Mathar, Apr 16 2016
STATUS
approved