The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A191630 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A191630

a(n) = floor((-1 + 2^n)/(1 + 2*n)).
(history; published version)

#19 by Charles R Greathouse IV at Thu Sep 08 08:45:57 EDT 2022

PROG

(MAGMAMagma) [Floor((-1 + 2^n)/(2*n + 1)): n in [1..50]]; // Vincenzo Librandi, Sep 12 2011

Discussion

Thu Sep 08

08:45

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

#18 by Alois P. Heinz at Sat Sep 08 21:17:23 EDT 2018

STATUS

reviewed

approved

#17 by Wesley Ivan Hurt at Sat Sep 08 19:45:56 EDT 2018

STATUS

proposed

reviewed

#16 by Altug Alkan at Sat Sep 08 19:02:57 EDT 2018

STATUS

editing

proposed

#15 by Altug Alkan at Sat Sep 08 19:02:07 EDT 2018

PROG

(PARI) a(n) = (2^n-1)\(2*n+1); \\ Altug Alkan, Sep 08 2018

STATUS

proposed

editing

#14 by Jon E. Schoenfield at Sat Sep 08 17:22:28 EDT 2018

STATUS

editing

proposed

#13 by Jon E. Schoenfield at Sat Sep 08 17:22:05 EDT 2018

NAME

Floora(n) = floor((-1 + 2^n)/(1 + 2*n)).

PROG

(MAGMA) [Floor((-1 + 2^n)/(2*n + 1)): n in [1..50]]; // _Vincenzo Librandi, _, Sep 12 2011

(Maxima) A191630(n):=floor((-1+2^n)/(1+2*n))$ makelist(A191630(n), n, 1, 30); /*_ _Martin Ettl_, Oct 25 2012 */

STATUS

approved

editing

#12 by N. J. A. Sloane at Fri Oct 26 02:30:18 EDT 2012

STATUS

proposed

approved

#11 by Martin Ettl at Thu Oct 25 21:45:15 EDT 2012

STATUS

editing

proposed

#10 by Martin Ettl at Thu Oct 25 21:45:11 EDT 2012

PROG

(Maxima) A191630(n):=floor((-1+2^n)/(1+2*n))$ makelist(A191630(n), n, 1, 30); /*Martin Ettl, Oct 25 2012*/

STATUS

approved

editing