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A232361 Peak values in A232221. 3
590868, 586496, 392956, 392612, 369532, 371872, 348760, 92820, 98000, 97424, 268428, 7855172, 11351516, 12763068, 12778820, 12778872, 12778940, 14485860, 16971756, 16976632, 17062548, 17065428, 16934020, 33084456, 33100460, 33116544, 32916668, 32921404 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

max{A232221(A232359(n)-1),A232221(A232359(n)+1)} < a(n).

First entry < 0: a(77) = -279411084.

LINKS

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

FORMULA

a(n) = A232221(A232359(n)).

EXAMPLE

n = 17: A232359(17) = 3628, a(17) = 12778940:

A232221(3628) = 12778940, whereas A232221(3628-1) = 12778756 and A232221(3628+1) = 12778920 are both less than a(17), with altitude differences 184 and 20. Therefore a(17) is the altitude of a peak in A232221. It can be identified in oeis.org/A232221/graph as top of a foothill.

n = 461: A232359(461) = 373250, a(461) = -2419822248:

A232221(373250) = -2419822248, whereas A232221(373250-1) = -2419823140 and A232221(373250+1) = -2419823192 are both less than a(461), with altitude differences 892 and 944. Therefore a(461) is the altitude of a peak in A232221. It can be identified in Hans Havermann's third plot (< 1.5 million) as the below-axis peak under the 4 of 400000.

PROG

(Haskell)

a232361 n = a232361_list !! (n-1)  -- a232361_list is defined in A232359.

CROSSREFS

Sequence in context: A216927 A090871 A237493 * A236736 A205270 A187643

Adjacent sequences:  A232358 A232359 A232360 * A232362 A232363 A232364

KEYWORD

sign

AUTHOR

Reinhard Zumkeller, Nov 24 2013

STATUS

approved

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Last modified January 17 16:31 EST 2021. Contains 340246 sequences. (Running on oeis4.)