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A101949 Peak-trough transform of the prime-gap sequence (A001223). 1
0, 0, 0, 1, -1, 1, -1, 0, 1, -1, 1, 0, -1, 0, 0, 0, -1, 1, 0, -1, 1, -1, 0, 3, 0, -1, 1, -1, 0, 3, -1, 1, -1, 3, -1, 0, 0, -1, 0, 0, -1, 3, -1, 1, -1, 0, 0, 0, -1, 0, 1, -1, 3, 0, 0, 0, -1, 1, 0, -1, 0, 3, 0, -3, 0, 3, -1, 1, -3, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,24

COMMENTS

The peak-trough transform is defined in A101941

LINKS

Table of n, a(n) for n=1..71.

EXAMPLE

a(4)=1 because A101949(4) is greater than one nearest neighbor on both sides, i.e. A101949(3) and A101949(5), but no more than one.

CROSSREFS

Cf. A001223, A101941.

Sequence in context: A119624 A213727 A119612 * A124796 A065714 A110700

Adjacent sequences:  A101946 A101947 A101948 * A101950 A101951 A101952

KEYWORD

sign

AUTHOR

Neil Fernandez, Dec 22 2004

STATUS

approved

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Last modified February 16 09:04 EST 2019. Contains 320159 sequences. (Running on oeis4.)