A334236 - OEIS

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A334236

a(n) is the Y-coordinate of the point at n steps backward from the origine along the H-order curve defined in A334232; sequence A334235 gives X-coordinates.

3

0, 1, 2, 3, 3, 2, 2, 3, 4, 5, 5, 4, 4, 5, 6, 7, 7, 6, 6, 7, 7, 6, 5, 4, 4, 5, 6, 7, 7, 6, 6, 7, 8, 9, 9, 8, 8, 9, 10, 11, 11, 10, 9, 8, 8, 9, 9, 8, 8, 9, 10, 11, 11, 10, 10, 11, 12, 13, 13, 12, 12, 13, 14, 15, 15, 14, 14, 15, 15, 14, 13, 12, 12, 13, 14, 15, 15

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

OFFSET

0,3

LINKS

Rémy Sigrist, Table of n, a(n) for n = 0..8192

Rémy Sigrist, PARI program for A334236

Index entries for sequences related to coordinates of 2D curves

FORMULA

A334232(a(n), A334235(n)) = -n.

EXAMPLE

The "backward" branch of H-order curve starting from the origin is as follows:

7| -15..-16 -19..-20 -27..-28 -31

| | | | | | | |

6| -14 -17..-18 -21 -26 -29..-30

| | | |

5| -13 -10...-9 -22 -25

| | | | | |

4| -12..-11 -8 -23..-24

| |

3| -3...-4 -7

| | | |

2| -2 -5...-6

| |

1| -1

| |

0| 0

---+----------------------------------------

y/x| 0 1 2 3 4 5 6 7

- hence a(28) = a(29) = 5.

PROG

(PARI) See Links section.

CROSSREFS

Cf. A334232, A334235.

Sequence in context: A348241 A110764 A107901 * A030423 A130631 A282014

Adjacent sequences: A334233 A334234 A334235 * A334237 A334238 A334239

KEYWORD

nonn

AUTHOR

Rémy Sigrist, Apr 20 2020

STATUS

approved