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A086061
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Sum of first n 8-almost primes.
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0
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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| 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 (jvospost3(AT)gmail.com), Dec 11 2004
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EXAMPLE
| a(2)=640 because sum of first two 8-almost primes i.e. 256+384 is 640.
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CROSSREFS
| Sequence in context: A110297 A134608 A134609 * A045057 A195091 A203450
Adjacent sequences: A086058 A086059 A086060 * A086062 A086063 A086064
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KEYWORD
| easy,nonn
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AUTHOR
| Shyam Sunder Gupta (guptass(AT)rediffmail.com), Aug 24 2003
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