The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A098890 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A098890

a(n) = A001652(n)*A046090(n)+1 = A098602(n)+1.
(history; published version)

#22 by Joerg Arndt at Sat Sep 02 04:51:59 EDT 2017

STATUS

editing

approved

#21 by César Aguilera at Mon Aug 21 15:43:40 EDT 2017

FORMULA

a(n)= (A001652(n) * A046090(n))+1 . César Aguilera, Aug 20 2017

a(n)= sqrt(A001652(n)^2 * A046090(n)^2) + 1 . César Aguilera, Aug 20 2017

Discussion

Mon Aug 28

20:00

OEIS Server: This sequence has not been edited or commented on for a week
yet is not proposed for review.  If it is ready for review, please
visit https://oeis.org/draft/A098890 and click the button that reads
"These changes are ready for review by an OEIS Editor."

Thanks.
  - The OEIS Server

#20 by César Aguilera at Sun Aug 20 20:21:26 EDT 2017

FORMULA

a(n)= (A001652(n)^2 + * A046090(n)^2 )+1 . César Aguilera, Aug 20 2017

a(n)= sqrt(A001652(n)^2 * A046090(n)^2) + 1 . César Aguilera, Aug 20 2017

STATUS

proposed

editing

Discussion

Sun Aug 20

20:27

César Aguilera: Arndt, let me write the conjecture:
If n^2+(n+1)^2 is square then n^2*(n+1)^2 is square too. I made a small proof.

Mon Aug 21

15:43

César Aguilera: I will delete the comment because there are lots of formulas like this and are becoming redundant.

#19 by César Aguilera at Sun Aug 20 19:59:56 EDT 2017

STATUS

editing

proposed

#18 by César Aguilera at Sun Aug 20 19:59:12 EDT 2017

FORMULA

a(n)= A001652(n)^2 + A046090(n)^2 . César Aguilera, Aug 20 2017

STATUS

approved

editing

#17 by Bruno Berselli at Wed Mar 02 11:34:52 EST 2016

STATUS

proposed

approved

#16 by Colin Barker at Wed Mar 02 11:29:11 EST 2016

STATUS

editing

proposed

#15 by Colin Barker at Wed Mar 02 11:28:55 EST 2016

FORMULA

a(n) = (5/8+1/16*(17+12*sqrt(2))^(-n)*(3-2*sqrt(2)+(3+2*sqrt(2))*(17+12*sqrt(2))^(2*n))). - Colin Barker, Mar 02 2016

STATUS

approved

editing

#14 by Charles R Greathouse IV at Sun Aug 16 12:03:57 EDT 2015

LINKS

<a href="/index/Rec#order_03">Index to sequences with entries for linear recurrences with constant coefficients</a>, signature (35,-35,1).

Discussion

Sun Aug 16

12:03

OEIS Server: https://oeis.org/edit/global/2451

#13 by Ray Chandler at Thu Jul 09 17:57:19 EDT 2015

STATUS

editing

approved