id:A074798 - OEIS Search Results

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Floor of S*n^2, where S equals sum of reciprocal terms of this same sequence.

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1, 5, 13, 23, 36, 52, 72, 94, 119, 147, 178, 211, 248, 288, 331, 376, 425, 476, 531, 588, 649, 712, 778, 847, 919, 994, 1072, 1153, 1237, 1324, 1414, 1507, 1602, 1701, 1803, 1907, 2014, 2125, 2238, 2354, 2474, 2596, 2721, 2849, 2980, 3114, 3251, 3391, 3533 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) = floor(S*n^2), where S = sum_{k=1..inf} 1/a(k).`
	EXAMPLE	`a(10) = 147 because a(10) = floor(S*10^2), where S = 1/1 + 1/5 + 1/13 + 1/23 + 1/36 + 1/52 + 1/72 +... + 1/a(k) +... {k=1..inf}.` `S = 1.471869231468455847281... This should be good to about 20 digits. - David Einstein (Deinst(AT)world.std.com)`
	CROSSREFS	`Sequence in context: A125830 A049882 A108195 this_sequence A031336 A099958 A049833` `Adjacent sequences: A074795 A074796 A074797 this_sequence A074799 A074800 A074801`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Sep 08 2002`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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