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!)
A110713 Number of distinct products a1*a2*...*an where 1<=ai<=n. 4
1, 3, 10, 25, 91, 196, 750, 1485, 3025, 5566, 23387, 38402, 163268, 284376, 500004, 795549, 3575781, 5657839, 25413850, 40027130, 66010230, 105164280, 490429875, 713491350, 1232253906 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..25.

Gerhard Kirchner, Theory and aspects of extension

EXAMPLE

a(2) = A027424(2) = 3.

a(3) = A027425(3) = 10.

a(4) = A100437(4) = 25.

PROG

(PARI) a(n) = my(l = List()); forvec(x = vector(n, i, [1, n]), listput(l, prod(i = 1, n, x[i])), 1); listsort(l, 1); #l \\ David A. Corneth, Jan 02 2019

CROSSREFS

Main diagonal of A322967.

Cf. A027424, A027425, A100437.

Sequence in context: A095052 A196984 A131433 * A098702 A100001 A227937

Adjacent sequences:  A110710 A110711 A110712 * A110714 A110715 A110716

KEYWORD

nonn,more

AUTHOR

Jonas Wallgren, Sep 15 2005

EXTENSIONS

a(10)-a(15) from Donovan Johnson, Dec 08 2009

a(16)-a(25) from Gerhard Kirchner, Dec 07 2015

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 September 26 19:55 EDT 2020. Contains 337374 sequences. (Running on oeis4.)