A143845 - OEIS

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A143845

Periodic with period 8: repeat 0, 8, 12, 14, 15, 7, 3, 1.

0, 8, 12, 14, 15, 7, 3, 1, 0, 8, 12, 14, 15, 7, 3, 1, 0, 8, 12, 14, 15, 7, 3, 1, 0, 8, 12, 14, 15, 7, 3, 1, 0, 8, 12, 14, 15, 7, 3, 1, 0, 8, 12, 14, 15, 7, 3, 1, 0, 8, 12, 14, 15, 7, 3, 1, 0, 8, 12, 14, 15, 7, 3, 1, 0, 8, 12, 14, 15, 7, 3, 1, 0, 8, 12, 14, 15, 7, 3, 1, 0, 8, 12, 14, 15, 7, 3, 1, 0, 8, 12, 14, 15, 7, 3, 1

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OFFSET

0,2

COMMENTS

Convert the following binary numbers to base 10:

0000

1000

1100

1110

1111

0111

0011

0001

0000

1000

etc.

LINKS

Table of n, a(n) for n=0..95.

Index entries for linear recurrences with constant coefficients, signature (1,0,0,-1,1).

FORMULA

G.f.: x(x+2)(4+x^2)/((1-x)(1+x^4)). [From R. J. Mathar, Sep 04 2008]

a(n) = (9^n mod 17) - 1. - Ridouane Oudra, Sep 22 2024

CROSSREFS

Cf. A117589.

Sequence in context: A143813 A290135 A225533 * A270888 A281014 A048868

Adjacent sequences: A143842 A143843 A143844 * A143846 A143847 A143848

KEYWORD

nonn,easy

AUTHOR

Cassandra (ca947(AT)nyu.edu), Sep 03 2008

EXTENSIONS

Edited by N. J. A. Sloane, Sep 03 2008

STATUS

approved