A101949 Peak-trough transform of the prime-gap sequence (A001223).

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

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: A213727 A367452 A119612 * A124796 A343858 A065714

Adjacent sequences: A101946 A101947 A101948 * A101950 A101951 A101952

Keyword

sign

Author

Neil Fernandez, Dec 22 2004

Status

approved