A349319 a(n) is the X-coordinate of the n-th point of the hexdragon curve; sequence A349320 gives Y-coordinates.
0, 1, 1, 0, 0, 1, 1, 0, -1, -1, -2, -3, -3, -2, -2, -3, -3, -2, -2, -3, -4, -4, -5, -6, -7, -7, -6, -5, -4, -4, -5, -6, -7, -7, -8, -9, -9, -8, -8, -9, -9, -8, -8, -9, -10, -10, -11, -12, -12, -11, -11, -12, -12, -11, -11, -12, -13, -13, -14, -15, -16, -16
Offset: 0
Keywords
Examples
The hexdragon curve starts as follows:
16-17
/
15
\
14
/
12-13
/
11 8--7
\ / \
10--9 6
/
4--5
/
3
\
2
/
0--1
- so a(0) = a(3) = a(4) = a(7) = 0,
a(1) = a(2) = a(5) = a(6) = 1,
a(8) = a(9) = -1,
a(10) = a(13) = a(14) = a(17) = -2,
a(11) = a(12) = a(15) = a(16) = -3.
Links
- Rémy Sigrist, Table of n, a(n) for n = 0..4373
- Joerg Arndt, Matters Computational (The Fxtbook), section 1.31.4 Terdragon and hexdragon.
- Rémy Sigrist, Representation of the hexdragon curve after 6 iterations
- Rémy Sigrist, PARI program for A349319
- Index entries for sequences related to coordinates of 2D curves
Programs
-
PARI
See Links section.
Comments