login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A092344 a(0)=1; a(n) = sigma_2(n) + sigma_3(n). 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..42.

FORMULA

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

MATHEMATICA

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

CROSSREFS

Cf. A001157, A001158.

Sequence in context: A062548 A067293 A009368 * A281711 A216528 A329735

Adjacent sequences:  A092341 A092342 A092343 * A092345 A092346 A092347

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 20 2004

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 11 15:12 EDT 2020. Contains 336428 sequences. (Running on oeis4.)