A232359 - OEIS

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A232359

Positions of peak values in A232221.

3

425, 439, 561, 565, 633, 639, 678, 857, 883, 889, 1148, 2641, 3283, 3590, 3619, 3626, 3628, 4424, 4904, 4917, 4979, 4985, 5061, 7631, 7651, 7676, 7771, 7782, 7801, 7805, 8960, 9340, 9362, 9371, 9414, 9422, 9424, 9428, 9454, 9459, 9773, 10421, 10425, 10450

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

OFFSET

1,1

COMMENTS

max{A232221(a(n)-1),A232221(a(n)+1)} < A232221(a(n)) = A232361(n).

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..890

EXAMPLE

PROG

(Haskell)

a232359 n = a232359_list !! (n-1)

(a232359_list, a232361_list) = unzip $

f 2 (tail a232221_list) $ zipWith (-) (tail a232221_list) a232221_list

where f x (y:ys) (u:ws@(v:_))

| u > 0 && v < 0 = (x, y) : f (x + 1) ys ws

| otherwise = f (x + 1) ys ws

CROSSREFS

Sequence in context: A184766 A250377 A250342 * A294714 A294712 A160098

Adjacent sequences: A232356 A232357 A232358 * A232360 A232361 A232362

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Nov 24 2013

STATUS

approved