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

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A146295 Integers which are not the sum of a 4-almost prime and a prime. 4
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20, 22, 24, 25, 28, 30, 32, 34, 36, 40, 44, 46, 48, 50, 52, 54, 60, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 96, 108, 114, 116, 120, 126, 130, 132, 136, 144, 150, 156, 162, 168, 174, 180, 204, 210, 216, 240, 246, 258 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

Largest term is 60060 (see b-file). No more terms < 10^8. Conjectured to be complete.

LINKS

Donovan Johnson, Table of n, a(n) for n=2..196

EXAMPLE

20 is in this sequence because no 4-almost prime and a prime sum to 20. 21 is not in this sequence because the sum of 16 (4-almost prime) and 5 (prime) is 21.

CROSSREFS

Cf. A000040, A014613, A130588, A146296, A146297.

Sequence in context: A291149 A275156 A188459 * A123719 A113221 A113219

Adjacent sequences:  A146292 A146293 A146294 * A146296 A146297 A146298

KEYWORD

fini,nonn

AUTHOR

Donovan Johnson, Nov 05 2008

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 23 20:23 EST 2017. Contains 295141 sequences.