The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A092344

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A092344

a(0)=1; a(n) = sigma_2(n) + sigma_3(n).
(history; published version)

#9 by Harvey P. Dale at Wed Feb 05 14:19:50 EST 2020

STATUS

editing

approved

#8 by Harvey P. Dale at Wed Feb 05 14:19:47 EST 2020

MATHEMATICA

Join[{1}, Table[DivisorSigma[2, n]+DivisorSigma[3, n], {n, 50}]] (* Harvey P. Dale, Feb 05 2020 *)

STATUS

approved

editing

#7 by Alois P. Heinz at Fri Mar 17 17:54:52 EDT 2017

STATUS

proposed

approved

#6 by Ilya Gutkovskiy at Fri Mar 17 15:55:34 EDT 2017

STATUS

editing

proposed

#5 by Ilya Gutkovskiy at Fri Mar 17 15:55:27 EDT 2017

FORMULA

G.f.: 1 + Sum_({k>=1} k^2*(k + 1)*x^k/(1 - x^k). - Ilya Gutkovskiy, Mar 17 2017

#4 by Ilya Gutkovskiy at Fri Mar 17 15:36:56 EDT 2017

FORMULA

G.f.: 1 + Sum_(k>=1} k^2*(k + 1)*x^k/(1 - x^k). - Ilya Gutkovskiy, Mar 17 2017

CROSSREFS

Cf. A001157, A001158.

STATUS

approved

editing

#3 by Russ Cox at Fri Mar 30 16:49:52 EDT 2012

AUTHOR

_N. J. A. Sloane (njas(AT)research.att.com), _, Mar 20 2004

Discussion

Fri Mar 30

16:49

OEIS Server: https://oeis.org/edit/global/110

#2 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

KEYWORD

nonn,new

nonn

AUTHOR

N. J. A. Sloane (njas, (AT)research.att.com), Mar 20 2004

#1 by N. J. A. Sloane at Sat Jun 12 03:00:00 EDT 2004

NAME

a(0)=1; a(n) = sigma_2(n) + sigma_3(n).

DATA

1, 2, 14, 38, 94, 152, 302, 394, 670, 848, 1264, 1454, 2254, 2368, 3346, 3788, 5022, 5204, 7268, 7222, 9744, 10132, 12598, 12698, 17230, 16402, 20632, 21260, 26162, 25232, 33052, 30754, 38814, 38516, 45676, 44644, 57172, 52024, 63550, 63244, 75920, 70604, 89188

OFFSET

0,2

KEYWORD

nonn

AUTHOR

njas, Mar 20 2004

STATUS

approved