A277889 - OEIS

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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.

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,13

COMMENTS

Is a(2358) = 0 the last zero of this sequence? See also comments in A277891.

LINKS

Antti Karttunen, Table of n, a(n) for n = 0..41014

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)))))