The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A125110 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A125110

Cubes which have a partition as the sum of 2 squares.
(history; published version)

#22 by Alois P. Heinz at Mon Jun 27 16:00:08 EDT 2022

STATUS

proposed

approved

#21 by Michel Marcus at Mon Jun 27 15:02:52 EDT 2022

STATUS

editing

proposed

#20 by Michel Marcus at Mon Jun 27 15:02:49 EDT 2022

PROG

(PARI) isA125110(ncube)={ local(a) ; a=0; while(a^2<=ncube, if(issquare(ncube-a^2), return(1) ; ) ; a++ ; ) ; return(0) ; } { for(n=0, 200, if(isA125110(n^3), print1(n^3, ", ") ; ) ; ) ; } - _\\ _R. J. Mathar_, Nov 23 2006

STATUS

proposed

editing

#19 by Chai Wah Wu at Mon Jun 27 15:01:04 EDT 2022

STATUS

editing

proposed

#18 by Chai Wah Wu at Mon Jun 27 15:00:36 EDT 2022

PROG

(Python)

def A125110_gen(): # generator of terms

return map(lambda m:m**3, filter(lambda n:all(p & 3 != 3 or e & 1 == 0 for p, e in factorint(n).items()), count(0)))

A125110_list = list(islice(A125110_gen(), 20)) # Chai Wah Wu, Jun 27 2022

STATUS

approved

editing

#17 by Michel Marcus at Fri Jun 04 03:14:04 EDT 2021

STATUS

reviewed

approved

#16 by Peter Luschny at Fri Jun 04 02:54:14 EDT 2021

STATUS

proposed

reviewed

#15 by Amiram Eldar at Fri Jun 04 02:46:33 EDT 2021

STATUS

editing

proposed

#14 by Amiram Eldar at Fri Jun 04 02:38:03 EDT 2021

EXAMPLE

125 = 5^3 = 2^2 + 11^2 = A001481(54) = A000578(8).

#13 by Amiram Eldar at Fri Jun 04 02:37:42 EDT 2021

LINKS

Amiram Eldar, <a href="/A125110/b125110.txt">Table of n, a(n) for n = 1..10000</a>

STATUS

approved

editing