A163528 The X-coordinate of the n-th point in the Peano curve A163334.

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

Offset

0,3

Comments

There is a 2-state automaton that accepts exactly those pairs (n,a(n)) where n is represented in base 9 and a(n) in base 3; see accompanying file a163528.pdf - Jeffrey Shallit, Aug 10 2023

Links

Antti Karttunen, Table of n, a(n) for n = 0..59048

Jeffrey Shallit, Automaton for A163528

Index entries for sequences related to coordinates of 2D curves

Formula

a(n) = A025581(A163335(n)) = A002262(A163337(n)) = A163325(A163332(n)).

Crossrefs

Cf. A025581, A163335, A002262, A163337, A163325, A163332.

See also: A059252, A059253, A163529, A163530, A163531, A163532.

Sequence in context: A368127 A368122 A281459 * A329054 A239509 A360985

Adjacent sequences: A163525 A163526 A163527 * A163529 A163530 A163531

Keyword

nonn

Author

Antti Karttunen, Aug 01 2009

Extensions

Name corrected by Kevin Ryde, Aug 28 2020

Status

approved