A367896 - OEIS

A367896

a(n) is the y-coordinate of the n-th point in a square spiral mapped to a square grid rotated by Pi/4 using the variant of the distance-limited strip bijection described in A367150.

0, 1, 1, 1, 0, -1, -1, -1, 0, 0, 1, 2, 3, 2, 2, 1, 0, 0, -1, -2, -3, -2, -2, -1, 0, 1, 2, 2, 3, 3, 4, 3, 3, 2, 2, 1, 0, -1, -2, -2, -3, -3, -4, -3, -3, -2, -2, -1, 0, 0, 1, 2, 3, 4, 4, 5, 6, 5, 4, 4, 3, 2, 1, 1, 0, 0, -1, -2, -3, -4, -4, -5, -6, -5, -4, -4, -3, -2, -1, -1, 0, 1

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

OFFSET

0,12

LINKS

Rainer Rosenthal, Table of n, a(n) for n = 0..3000

Hugo Pfoertner, Plot of mapped spiral, using Plot 2.

PROG

(PARI) \\ See A367895 for definitions of required functions.

a367896(n) = BijectionD([ax(n), ay(n)])[2]

CROSSREFS

A367895 gives the corresponding x-coordinates.

Cf. A307110, A362955, A362956, A367150.