The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A071238 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A071238

a(n) = n*(n+1)*(2*n^2+1)/6.
(history; published version)

#67 by Peter Luschny at Fri Feb 16 05:49:06 EST 2024

STATUS

reviewed

approved

#66 by Kevin Ryde at Fri Feb 16 03:05:05 EST 2024

STATUS

proposed

reviewed

#65 by Kevin Ryde at Fri Feb 16 03:04:59 EST 2024

STATUS

editing

proposed

#64 by Kevin Ryde at Fri Feb 16 03:04:14 EST 2024

CROSSREFS

Cf. A000292, A002417, A071270, A277229 (first differences).

STATUS

proposed

editing

#63 by Joerg Arndt at Fri Feb 16 01:12:54 EST 2024

STATUS

editing

proposed

#62 by Joerg Arndt at Fri Feb 16 01:12:50 EST 2024

FORMULA

From _a(n) = A002417(n-1) + A002417(n). - _Yasser Arath Chavez Reyes_, Feb 15 2024: (Start)

a(n) = (A000583(n) + A000578(n) + A000217(n))/3.

a(n) = ((A053134(n) + A000217(n))/2.

a(n) = A002417(n-1) + A002417(n).

a(n) = A005900(n) + A071245(n). (End)

STATUS

proposed

editing

#61 by Michel Marcus at Thu Feb 15 14:21:33 EST 2024

STATUS

editing

proposed

#60 by Michel Marcus at Thu Feb 15 14:20:32 EST 2024

FORMULA

From Yasser Arath Chavez Reyes, Feb 15 2024: (Start)

a(n) = A005900(n) + A071245(n). - _Yasser Arath Chavez Reyes_, Feb 15 2024(End)

STATUS

proposed

editing

Discussion

Thu Feb 15

14:21

Michel Marcus: I wonder ... keep only the 3rd one ?

#59 by Yasser Arath Chavez Reyes at Thu Feb 15 13:41:49 EST 2024

STATUS

editing

proposed

#58 by Yasser Arath Chavez Reyes at Thu Feb 15 13:40:47 EST 2024

FORMULA

a(n) = (A000583(n) + A000578(n) + A000217(n))/3.

a(n) = ((A053134(n) + A000217(n))/2.

a(n) = A002417(n-1) + A002417(n).

a(n) = A005900(n) + A071245(n). - Yasser Arath Chavez Reyes, Feb 15 2024

STATUS

approved

editing