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A007879 Chimes made by clock striking the hour and half-hour. 6
1, 1, 1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 7, 1, 8, 1, 9, 1, 10, 1, 11, 1, 12, 1, 1, 1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 7, 1, 8, 1, 9, 1, 10, 1, 11, 1, 12, 1, 1, 1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 7, 1, 8, 1, 9, 1, 10, 1, 11, 1, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

Periodic sequence with period 24. - Michel Marcus, Jul 17 2013

LINKS

Table of n, a(n) for n=0..71.

FORMULA

G.f.: g(x)=1/(1-x^2)+x(12x^26-13x^24+1)/((1-x^24)(1-x^2)^2). - Hieronymus Fischer, Sep 25 2007

Also: g(x)=(1+x-x^2-x^24-13x^25+x^26+12x^27)/((1-x^24)(1-x^2)^2) - Hieronymus Fischer, Sep 25 2007

a(n)=1+((n-1)*(1-(-1)^n)/4) mod 12. - Hieronymus Fischer, Sep 25 2007

a(n)=1+((n-1)*(n mod 2)/2) mod 12. - Hieronymus Fischer, Sep 25 2007

PROG

(PARI) a(n)= 1+ ((n-1)*(1-(-1)^n)/4) % 12 \\ Michel Marcus, Jul 17 2013

CROSSREFS

Cf. A057979, A010881.

Sequence in context: A322315 A319338 A177815 * A057979 A152271 A133622

Adjacent sequences:  A007876 A007877 A007878 * A007880 A007881 A007882

KEYWORD

nonn

AUTHOR

Jan Wolitzky

STATUS

approved

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Last modified July 28 19:33 EDT 2021. Contains 346335 sequences. (Running on oeis4.)