The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A247004 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A247004

Denominator of (n+4)/gcd(n, 4)^2, a 16-periodic sequence that associates A061037 with A106617.
(history; published version)

#35 by Charles R Greathouse IV at Thu Sep 08 08:46:09 EDT 2022

PROG

(MAGMAMagma) [Denominator((n+4)/Gcd(n, 4)^2): n in [0..100]]; // G. C. Greubel, Aug 05 2018

Discussion

Thu Sep 08

08:46

OEIS Server: https://oeis.org/edit/global/2944

#34 by Susanna Cuyler at Mon Oct 01 21:07:06 EDT 2018

STATUS

proposed

approved

#33 by Antti Karttunen at Mon Oct 01 15:22:52 EDT 2018

STATUS

editing

proposed

#32 by Antti Karttunen at Mon Oct 01 13:05:32 EDT 2018

LINKS

Antti Karttunen, <a href="/A247004/b247004.txt">Table of n, a(n) for n = 0..65537</a>

STATUS

approved

editing

#31 by Michael Somos at Sun Aug 05 23:18:56 EDT 2018

STATUS

editing

approved

#30 by Michael Somos at Sun Aug 05 23:18:48 EDT 2018

FORMULA

a(-n) = a(n+16) = a(-n), a(2*n + 1) = 1 for all n in Z. - Michael Somos, Sep 13 2014

STATUS

proposed

editing

#29 by Jon E. Schoenfield at Sun Aug 05 21:14:51 EDT 2018

STATUS

editing

proposed

#28 by Jon E. Schoenfield at Sun Aug 05 21:14:48 EDT 2018

NAME

Denominator of (n+4)/GCDgcd(n, 4)^2, a 16-periodic sequence that associates A061037 with A106617.

COMMENTS

One can notice that the analog numerators [numerators of (n+4)/GCDgcd(n, 4)^2] are A106617 left-shifted 4 places.

FORMULA

(n+4) / GCDgcd(n, 4)^2 = A188134(n+4) / 4. - Michael Somos, Sep 12 2014

STATUS

proposed

editing

#27 by G. C. Greubel at Sun Aug 05 21:11:41 EDT 2018

STATUS

editing

proposed

#26 by G. C. Greubel at Sun Aug 05 21:11:34 EDT 2018

PROG

(PARI) for(n=0, 100, print1(denominator((n+4)/gcd(n, 4)^2), ", ")) \\ G. C. Greubel, Aug 05 2018

(MAGMA) [Denominator((n+4)/Gcd(n, 4)^2): n in [0..100]]; // G. C. Greubel, Aug 05 2018

STATUS

approved

editing