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%I #7 Nov 14 2016 10:36:23
%S 0,1,0,-1,0,1,0,-1,0,-1,0,-1,-2,-1,-2,-3,-2,-1,-2,-1,0,-1,0,1,0,1,0,
%T -1,0,-1,-2,-1,0,-1,-2,-1,-2,-1,-2,-1,-2,-3,-2,-1,-2,-1,-2,-3,-2,-3,
%U -4,-3,-2,-3,-2,-1,-2,-1,-2,-3,-4,-3,-4,-3,-2,-3,-2,-1,-2,-1,-2,-1,-2,-3,-2,-1,-2,-1,-2,-1,0,-1,0,1,2,1,0
%N After zero, excess of the odd terms in A276573 (the infinite trunk of least squares beanstalk) over the even terms.
%C Is a(2358) = 0 the last zero of this sequence? See also comments in A277891.
%H Antti Karttunen, <a href="/A277889/b277889.txt">Table of n, a(n) for n = 0..41014</a>
%F a(0) = 0; for n >= 1, a(n) = a(n-1) - (-1)^A276573(n).
%o (Scheme, with memoization-macro definec)
%o (definec (A277889 n) (if (zero? n) n (- (A277889 (- n 1)) (expt -1 (A276573 n)))))
%Y Cf. A002828, A276573, A277890, A277891.
%K sign
%O 0,13
%A _Antti Karttunen_, Nov 13 2016