The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A000668 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A000668

Mersenne primes (primes of the form 2^n - 1).
(history; published version)

#439 by Joerg Arndt at Wed May 22 01:14:33 EDT 2024

FORMULA

a(n) = (A197594(n)^2)/2 + A197594(n) - 1/2 for n > 1. - César Aguilera, May 18 2024

KEYWORD

nonn,nice,hard,changed

STATUS

editing

approved

#438 by Joerg Arndt at Mon May 20 03:46:18 EDT 2024

STATUS

proposed

editing

#437 by César Aguilera at Sun May 19 13:57:15 EDT 2024

STATUS

editing

proposed

Discussion

Sun May 19

19:39

Jon E. Schoenfield: @Joerg: do you think the Formula entry should be moved to A197594 (reformatted for use there)? Or to some other sequence entry? Or just rejected?

Mon May 20

03:46

Joerg Arndt: rather in A197594

#436 by César Aguilera at Sun May 19 13:55:31 EDT 2024

FORMULA

a(n) = (A197594(n)^2)/2 + A197594(n) - 1/2 for a(n) > 31. - César Aguilera, May 18 2024

STATUS

proposed

editing

#435 by Jon E. Schoenfield at Sat May 18 19:24:10 EDT 2024

STATUS

editing

proposed

Discussion

Sun May 19

02:49

Joerg Arndt: does not belong here

#434 by Jon E. Schoenfield at Sat May 18 19:22:46 EDT 2024

FORMULA

a(n) = (A197594(n)^2)/2 + A197594(n) - 1/2.For for a(n) > 3. - César Aguilera, May 18 2024

STATUS

proposed

editing

Discussion

Sat May 18

19:24

Jon E. Schoenfield: For simplicity, replace “for a(n) > 3” with “for n > 1”?

#433 by César Aguilera at Sat May 18 19:17:30 EDT 2024

STATUS

editing

proposed

#432 by César Aguilera at Sat May 18 19:15:32 EDT 2024

FORMULA

a(n) = (A197594(n)^2)/2 + A197594(n) - 1/2.For a(n)>3. - César Aguilera, May 18 2024

STATUS

approved

editing

#431 by Michael De Vlieger at Fri Nov 17 11:46:24 EST 2023

STATUS

reviewed

approved

#430 by Michel Marcus at Fri Nov 17 11:46:03 EST 2023

STATUS

proposed

reviewed