A255332 Partial sums of A255331.

-1, -1, -1, -5, -4, -4, -11, -11, -14, -13, -13, -10, -10, -16, -16, -22, -22, -25, -24, -24, -21, -21, -33, -33, -33, -38, -38, -34, -34, -40, -40, -46, -46, -49, -48, -48, -45, -45, -57, -57, -57, -50, -49, -61, -59, -59, -59, -64, -64, -60, -60, -72, -72, -72, -77, -77, -73, -73, -79, -79, -85, -85, -88, -87, -87, -84

Offset

0,4

Comments

a(805) = 54 is the first positive term.

Is a(836) = -32 the last negative term?

The conspicuous "noncontinuity" which occurs in the scatter plot for the first time at n=5790 is caused by a sudden negative record at A255331(5790) = -708. Note that A255328(5790) = 708.

Links

Antti Karttunen, Table of n, a(n) for n = 0..16140

A. Karttunen, Scatter plot of sequence plotted up to n=8590 (Drawn with the help of OEIS server's graph-utility).

A. Karttunen, Ratio A255332(n)/a(n) plotted with the help of OEIS-server

Formula

a(0) = -1; for n >= 1: a(n) = a(n-1) + A255331(n).

Prog

(Scheme, with memoization-macro definec)
(definec (A255332 n) (if (zero? n) -1 (+ (A255332 (- n 1)) (A255331 n))))

Crossrefs

Cf. A255125, A255328, A255329, A255331, A255332, A255333.

Analogous sequences: A218789, A230409.

Sequence in context: A303270 A340918 A244046 * A071419 A291069 A019117

Adjacent sequences: A255329 A255330 A255331 * A255333 A255334 A255335

Keyword

sign,look

Author

Antti Karttunen, Feb 21 2015

Status

approved