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A062187 a(n+1) = a(n) - a(floor(n/2)), with a(0)=0, a(1)=1. 2
0, 1, 1, 0, -1, -2, -3, -3, -3, -2, -1, 1, 3, 6, 9, 12, 15, 18, 21, 23, 25, 26, 27, 26, 25, 22, 19, 13, 7, -2, -11, -23, -35, -50, -65, -83, -101, -122, -143, -166, -189, -214, -239, -265, -291, -318, -345, -371, -397, -422, -447, -469, -491, -510, -529, -542, -555, -562, -569, -567, -565, -554, -543, -520, -497, -462 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

Period of oscillations above and below the axis more than doubles at each cycle.

LINKS

Table of n, a(n) for n=0..65.

FORMULA

G.f. A(x) satisfies: A(x) = x * (1 - (1 + x)*A(x^2))/(1 - x). - Ilya Gutkovskiy, May 04 2019

EXAMPLE

a(6)=a(5)-a(2)=-2-1=-3.

a(7)=a(6)-a(3)=-3-0=-3.

CROSSREFS

Cf. A033485, A062186, A062188.

Sequence in context: A143605 A098418 A128080 * A031283 A293229 A185437

Adjacent sequences:  A062184 A062185 A062186 * A062188 A062189 A062190

KEYWORD

sign

AUTHOR

Henry Bottomley, Jun 13 2001

STATUS

approved

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Last modified November 21 06:00 EST 2019. Contains 329350 sequences. (Running on oeis4.)