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Sum of first n 3-almost primes.

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4

8, 20, 38, 58, 85, 113, 143, 185, 229, 274, 324, 376, 439, 505, 573, 643, 718, 794, 872, 964, 1062, 1161, 1263, 1368, 1478, 1592, 1708, 1825, 1949, 2074, 2204, 2342, 2489, 2637, 2790, 2944, 3108, 3273, 3443, 3614, 3786, 3960, 4135, 4317, 4503, 4691, 4881 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Elements in this sequence can themselves be 3-almost primes. a(1) = 8 = 2^3. a(2) = 20 = 2^2 * 5. a(20) = 964 = 2^2 * 241. a(28) = 1825 = 5^2 * 73. a(30) = 2074 = 2 * 17 * 61. a(34) = 2637 = 3^2 * 293. a(40) = 3614 = 2 * 13 * 139. a(41) = 3786 = 2 * 3 * 631. a(45) = 4503 = 3 * 19 * 79. Does this happen infinitely often? - Jonathan Vos Post (jvospost2(AT)yahoo.com), Dec 11 2004`
	EXAMPLE	`a(2)=20 because sum of first two 3-almost primes i.e. 8+12 is 20.`
	CROSSREFS	`Adjacent sequences: A086059 A086060 A086061 this_sequence A086063 A086064 A086065` `Sequence in context: A038522 A004118 A073607 this_sequence A006416 A121307 A086169`
	KEYWORD	`easy,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Aug 24 2003`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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