A232361 Peak values in A232221.

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

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