The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A098301 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A098301

Member r=16 of the family of Chebyshev sequences S_r(n) defined in A092184.
(history; published version)

#59 by Joerg Arndt at Wed Feb 24 02:43:39 EST 2021

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reviewed

approved

#58 by Michel Marcus at Tue Feb 23 22:48:41 EST 2021

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proposed

reviewed

#57 by Michael De Vlieger at Tue Feb 23 18:29:52 EST 2021

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editing

proposed

#56 by Michael De Vlieger at Tue Feb 23 18:29:50 EST 2021

LINKS

S. Barbero, U. Cerruti, and N. Murru, <a href="http://www.seminariomatematico.polito.it/rendiconti/78-1/BarberoCerrutiMurru.pdf">On polynomial solutions of the Diophantine equation (x + y - 1)^2 = wxy</a>, Rendiconti Sem. Mat. Univ. Pol. Torino (2020) Vol. 78, No. 1, 5-12.

MATHEMATICA

LinearRecurrence[{# - 1, -# + 1, 1}, {0, 1, #}, 20] &[16] (* Michael De Vlieger, Feb 23 2021 *)

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approved

editing

#55 by Bruno Berselli at Fri Jan 12 10:05:55 EST 2018

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editing

approved

#54 by Bruno Berselli at Fri Jan 12 10:05:52 EST 2018

COMMENTS

Also n m such that (3*nm^2 + nm)/4 = nm*(3*n m + 1)/4 is a perfect square. - Ctibor O. Zizka, Oct 15 2010

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approved

editing

#53 by Joerg Arndt at Sat Dec 16 05:42:02 EST 2017

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reviewed

approved

#52 by Michel Marcus at Fri Dec 15 12:23:03 EST 2017

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proposed

reviewed

#51 by Wesley Ivan Hurt at Wed Nov 29 20:29:18 EST 2017

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editing

proposed

#50 by Wesley Ivan Hurt at Wed Nov 29 20:29:06 EST 2017

FORMULA

a(n) = (A001075(n)^2-1)/3 . - Parker Grootenhuis, Nov 28 2017

STATUS

proposed

editing