A163537 - OEIS

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A163537

The relative direction (0=straight ahead, 1=turn right, 2=turn left) of the Peano curve A163336 at point n.

3

0, 2, 2, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 2, 2, 0, 0, 0, 0, 2, 2, 0, 1, 1, 0, 2, 2, 0, 1, 1, 0, 2, 2, 0, 0, 0, 0, 2, 2, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 2, 2, 0, 1, 1, 0, 2, 2, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 2, 2, 0, 0, 0, 0, 2, 2, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 2, 2, 0, 0, 0, 0, 2, 2, 0, 1, 1, 0, 0, 0, 0, 1, 1

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

OFFSET

1,2

COMMENTS

a(9*n) = a(81*n) for all n.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..6561

FORMULA

a(n) = A163241((A163535(n+1)-A163535(n)) modulo 4).

a(n) = A014681(A163536(n)).

PROG

(Scheme:) (define (A163537 n) (A163241 (modulo (- (A163535 (1+ n)) (A163535 n)) 4)))

CROSSREFS

Cf. A163535 (direction), A163536 (transposed relative).

Sequence in context: A187752 A295181 A215573 * A219946 A117449 A004594

Adjacent sequences: A163534 A163535 A163536 * A163538 A163539 A163540

KEYWORD

nonn

AUTHOR

Antti Karttunen, Aug 01 2009

EXTENSIONS

Name corrected by Kevin Ryde, Aug 29 2020

STATUS

approved