|
Search: id:A086061
|
|
|
| A086061 |
|
Sum of first n 8-almost primes. |
|
+0
1
|
|
| 256, 640, 1216, 1856, 2720, 3616, 4576, 5872, 7216, 8624, 10064, 11664, 13328, 15272, 17288, 19400, 21560, 23736, 25976, 28376, 30808, 33304, 36220, 39164, 42188, 45324, 48492, 51732, 54996, 58356, 61876, 65476, 69124, 72836, 76580
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Elements in this sequence can themselves be 8-almost primes, as happens often for 5-almost primes. a(1) = 256 = 2^8. Also an 8-Brilliant number. a(2) = 640 = 2^7 * 5. Also an 8-Brilliant number. Does this happen infinitely often? - Jonathan Vos Post (jvospost2(AT)yahoo.com), Dec 11 2004
|
|
EXAMPLE
|
a(2)=640 because sum of first two 8-almost primes i.e. 256+384 is 640.
|
|
CROSSREFS
|
Sequence in context: A110297 A134608 A134609 this_sequence A045057 A135272 A045034
Adjacent sequences: A086058 A086059 A086060 this_sequence A086062 A086063 A086064
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Shyam Sunder Gupta (guptass(AT)rediffmail.com), Aug 24 2003
|
|
|
Search completed in 0.002 seconds
|
