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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A152771 a(n) = sigma(n) - 2*d(n) + 1. 2
0, 0, 1, 2, 3, 5, 5, 8, 8, 11, 9, 17, 11, 17, 17, 22, 15, 28, 17, 31, 25, 29, 21, 45, 26, 35, 33, 45, 27, 57, 29, 52, 41, 47, 41, 74, 35, 53, 49, 75, 39, 81, 41, 73, 67, 65, 45, 105, 52, 82, 65, 87, 51, 105, 65, 105, 73, 83, 57, 145 (list; graph; refs; listen; history; internal format)
OFFSET

1,4

CROSSREFS

Cf. A000005, A000203, A152770, A152772.

Sequence in context: A204926 A188201 A184165 * A194939 A135635 A204207

Adjacent sequences:  A152768 A152769 A152770 * A152772 A152773 A152774

KEYWORD

easy,nonn

AUTHOR

Omar E. Pol (info(AT)polprimos.com), Dec 14 2008

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 14 18:33 EST 2012. Contains 205663 sequences.