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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A074376 s(3s-1)/2 where s is the sum of the prime factors of n (with repetition). 1
0, 5, 12, 22, 35, 35, 70, 51, 51, 70, 176, 70, 247, 117, 92, 92, 425, 92, 532, 117, 145, 247, 782, 117, 145, 330, 117, 176, 1247, 145, 1426, 145, 287, 532, 210, 145, 2035, 651, 376, 176, 2501, 210, 2752, 330, 176, 925, 3290, 176, 287, 210, 590, 425, 4187 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

Neville Holmes, Integer Sequence Combinations

EXAMPLE

a(20) = 9(3*9-1)/2 = 117 because 9 = 2+2+5 and 20 = 2*2*5.

CROSSREFS

Applies A000326 to A001414. Cf. A074373, A074374, A074375.

Sequence in context: A028347 A038794 A131976 * A134340 A000326 A022795

Adjacent sequences:  A074373 A074374 A074375 * A074377 A074378 A074379

KEYWORD

easy,nonn

AUTHOR

Neville Holmes (neville.holmes(AT)utas.edu.au), Aug 29 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 16 11:21 EST 2012. Contains 205907 sequences.