login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A074284 Sum of the aliquot divisors of n-th triangular number. 1
0, 1, 6, 8, 9, 11, 28, 55, 33, 17, 78, 90, 21, 87, 240, 134, 81, 89, 170, 366, 153, 35, 396, 568, 109, 209, 582, 314, 285, 303, 496, 960, 303, 269, 1242, 816, 57, 379, 1572, 944, 483, 505, 638, 1818, 837, 71, 1752, 2244, 542, 957, 1698, 890, 729, 1395, 2492, 2884 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

T. D. Noe, Table of n, a(n) for n=1..1000

EXAMPLE

a(6)=11 because sum of aliquot divisors of 6th triangular number(i.e. 21) is 1+3+7=11.

CROSSREFS

Sequence in context: A025070 A123704 A045574 * A125736 A030725 A195101

Adjacent sequences:  A074281 A074282 A074283 * A074285 A074286 A074287

KEYWORD

nonn

AUTHOR

Shyam Sunder Gupta, Sep 21 2002

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 14 09:49 EST 2018. Contains 317182 sequences. (Running on oeis4.)