id:A064142 - OEIS Search Results

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Sum of all distinct primes dividing central binomial coefficient C(n,[n/2]).

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0, 2, 3, 5, 7, 7, 12, 14, 12, 12, 23, 23, 29, 29, 32, 34, 48, 48, 62, 62, 61, 61, 81, 81, 73, 73, 69, 69, 98, 98, 127, 129, 123, 123, 130, 130, 148, 148, 161, 161, 195, 195, 227, 227, 204, 204, 251, 251, 253, 253, 257, 257, 307, 307, 323, 323, 316, 316, 367, 367 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n)=A008472[A001405(n)]`
	CROSSREFS	`A008472, A001405.` `Sequence in context: A039734 A020482 A060308 this_sequence A067792 A119317 A039248` `Adjacent sequences: A064139 A064140 A064141 this_sequence A064143 A064144 A064145`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Sep 11 2001`

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

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