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!)
A162664 a(n) = sigma(n) + tau(n)^2. 2
2, 7, 8, 16, 10, 28, 12, 31, 22, 34, 16, 64, 18, 40, 40, 56, 22, 75, 24, 78, 48, 52, 28, 124, 40, 58, 56, 92, 34, 136, 36, 99, 64, 70, 64, 172, 42, 76, 72, 154, 46, 160, 48, 120, 114, 88, 52, 224, 66, 129, 88, 134, 58, 184, 88, 184, 96, 106, 64, 312, 66, 112, 140, 176, 100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A162663.

LINKS

Shawn A. Broyles, Table of n, a(n) for n = 1..10000

MATHEMATICA

Table[DivisorSigma[1, n] + DivisorSigma[0, n]^2, {n, 65}] (* Robert A. Russell, Apr 28 2018 *)

PROG

(PARI) a(n) = sigma(n) + numdiv(n)^2; \\ Michel Marcus, Apr 28 2018

CROSSREFS

Cf. A000005, A000203, A035116, A162663.

Sequence in context: A334227 A080572 A263602 * A341706 A032689 A331489

Adjacent sequences:  A162661 A162662 A162663 * A162665 A162666 A162667

KEYWORD

nonn

AUTHOR

Franklin T. Adams-Watters, Jul 09 2009

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 May 18 00:43 EDT 2021. Contains 343992 sequences. (Running on oeis4.)