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Second coordinate of a contiguous path on the odd numbered points of a square lattice leading to a distance-limited bijection with the even numbered points of a square lattice rotated by Pi/6 around the common point (0,0). A307446 gives the first coordinate.
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%I #19 May 29 2024 11:49:01

%S 1,1,3,5,5,5,3,3,3,5,7,7,9,11,11,11,13,15,15,17,19,19,19,17,17,17,19,

%T 21,21,21,19,19,19,17,15,15,13,11,11,11,9,9,9,11,13,13,13,11,11,11,13,

%U 15,15,17,19,19,19,21,23,23,25,27,27,27,25,25,25,27

%N Second coordinate of a contiguous path on the odd numbered points of a square lattice leading to a distance-limited bijection with the even numbered points of a square lattice rotated by Pi/6 around the common point (0,0). A307446 gives the first coordinate.

%C For a description of the construction and visualizations see A307446.

%H Hugo Pfoertner, <a href="/A307447/b307447.txt">Table of n, a(n) for n = 1..10000</a>

%H <a href="/index/Con#coordinates_2D_curves">Index entries for sequences related to coordinates of 2D curves</a>

%o (PARI) \\ See A307446 for PARI code.

%Y Cf. A307110, A307446.

%Y Coordinates of corresponding points on rotated lattice: A307482, A307483.

%K nonn

%O 1,3

%A _Hugo Pfoertner_, Apr 10 2019