

A124745


Expansion of (1+x)/(1x^2+x^3).


13



1, 1, 1, 0, 0, 1, 0, 1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12, 16, 21, 28, 37, 49, 65, 86, 114, 151, 200, 265, 351, 465, 616, 816, 1081, 1432, 1897, 2513, 3329, 4410, 5842, 7739, 10252, 13581, 17991, 23833, 31572
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,11


COMMENTS



LINKS



FORMULA

a(n) = Sum_{k=0..n} C(floor(k/2),nk)*(1)^(nk) = (1)^n*A078027(n).
a(n) = a(n2)  a(n3) with a(1) = a(2) = a(3) = 1.  Taras Goy, Mar 24 2019


CROSSREFS



KEYWORD

easy,sign


AUTHOR



STATUS

approved



