The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A356707 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A356707

Number of integral solutions to Mordell's equation y^2 = x^3 + n^3 with y positive.
(history; published version)

#15 by Jianing Song at Wed Aug 24 10:05:10 EDT 2022

STATUS

editing

proposed

#14 by Jianing Song at Wed Aug 24 10:04:26 EDT 2022

CROSSREFS

Indices of 0, 1, 2, and 3: A356709, A356710, A356711, A356712. See also A103254.

STATUS

approved

editing

Discussion

Wed Aug 24

10:05

Jianing Song: Sorry, A103254 is wrong here (requiring y to be positive)

#13 by Michael De Vlieger at Wed Aug 24 09:03:29 EDT 2022

STATUS

proposed

approved

#12 by Jianing Song at Tue Aug 23 23:00:08 EDT 2022

STATUS

editing

proposed

#11 by Jianing Song at Tue Aug 23 22:59:21 EDT 2022

FORMULA

a(n) = (A081119(n^3)-1)/2 = (A356706(n)-1)/2 = A356706(n) - A356708(n).

STATUS

proposed

editing

#10 by Jianing Song at Tue Aug 23 22:58:03 EDT 2022

STATUS

editing

proposed

#9 by Jianing Song at Tue Aug 23 22:57:36 EDT 2022

NAME

Number of integral solutions to the Mordell's equation y^2 = x^3 + n^3 with y positive.

STATUS

approved

editing

#8 by Michael De Vlieger at Tue Aug 23 22:50:57 EDT 2022

STATUS

proposed

approved

#7 by Jianing Song at Tue Aug 23 22:23:19 EDT 2022

STATUS

editing

proposed

#6 by Jianing Song at Tue Aug 23 22:22:13 EDT 2022

KEYWORD

nonn,hard,more,changed