id:A023863 - OEIS Search Results

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a(n) = s(1)t(n)+s(2)t(n-1)+...+s(k)t(n+1-k), where k=[ (n+1)/2 ], s = (natural numbers), t = (composite numbers).

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4, 6, 20, 25, 52, 59, 104, 119, 186, 211, 306, 338, 464, 502, 663, 715, 914, 981, 1222, 1297, 1585, 1667, 2004, 2104, 2494, 2615, 3062, 3191, 3700, 3854, 4429, 4610, 5256, 5466, 6186, 6426, 7224, 7477, 8356, 8620, 9582, 9878, 10929, 11261, 12405, 12774, 14014, 14422 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Sequence in context: A012969 A057789 A123169 this_sequence A024480 A066193 A026711` `Adjacent sequences: A023860 A023861 A023862 this_sequence A023864 A023865 A023866`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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