Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A108607
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A108607 4-almost primes whose sum of factors is a prime. +0
5
40, 54, 56, 88, 90, 104, 136, 184, 198, 210, 248, 250, 294, 296, 328, 350, 376, 390, 414, 424, 462, 488, 522, 536, 550, 570, 584, 664, 686, 714, 776, 798, 808, 824, 850, 856, 858, 930, 950, 954, 1014, 1048, 1062, 1110, 1190, 1208, 1210, 1218, 1256, 1274, 1278 (list; graph; listen)
OFFSET

1,1

EXAMPLE

40=2*2*2*5 (4-almost prime) and 2+2+2+5=11 is a prime.

CROSSREFS

Cf. A107707, A108608, A108609 (resp.) 3, 5, 6 (resp.)-almost primes whose sum of factors is a prime.

Sequence in context: A039523 A116299 A110227 this_sequence A109730 A100333 A116309

Adjacent sequences: A108604 A108605 A108606 this_sequence A108608 A108609 A108610

KEYWORD

nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Jun 12 2005

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified December 21 10:15 EST 2009. Contains 171081 sequences.


AT&T Labs Research