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A277889
After zero, excess of the odd terms in A276573 (the infinite trunk of least squares beanstalk) over the even terms.
4
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, -1, 0, -1, -2, -1, 0, -1, -2, -1, -2, -1, -2, -1, -2, -3, -2, -1, -2, -1, -2, -3, -2, -3, -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
OFFSET
0,13
COMMENTS
Is a(2358) = 0 the last zero of this sequence? See also comments in A277891.
LINKS
FORMULA
a(0) = 0; for n >= 1, a(n) = a(n-1) - (-1)^A276573(n).
PROG
(Scheme, with memoization-macro definec)
(definec (A277889 n) (if (zero? n) n (- (A277889 (- n 1)) (expt -1 (A276573 n)))))
CROSSREFS
KEYWORD
sign
AUTHOR
Antti Karttunen, Nov 13 2016
STATUS
approved