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

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)))))

Crossrefs

Cf. A002828, A276573, A277890, A277891.

Sequence in context: A364933 A361158 A329744 * A018194 A338630 A286281

Adjacent sequences: A277886 A277887 A277888 * A277890 A277891 A277892

Keyword

sign

Author

Antti Karttunen, Nov 13 2016

Status

approved