id:A064146 - OEIS Search Results

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Sum of non-unitary prime divisors (A034444, A056169) of central binomial coefficient C(n,[n/2]) (A001405). If A001405(n) is squarefree (A046098) then a(n)=0.

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0, 0, 0, 0, 0, 2, 0, 0, 3, 5, 0, 2, 2, 2, 3, 3, 0, 2, 0, 2, 2, 2, 0, 2, 7, 7, 10, 10, 5, 5, 3, 3, 3, 5, 5, 7, 7, 7, 3, 5, 2, 2, 2, 2, 10, 10, 8, 10, 12, 12, 12, 12, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 10, 10, 7, 9, 7, 9, 5, 5, 0, 2, 2, 2, 7, 7, 14, 14, 7, 9, 12, 12, 5, 5, 10, 10, 10, 10, 5, 5, 12, 12, 12 (list; graph; listen)

	OFFSET	`1,6`
	FORMULA	`a(n)=A063958[A001405(n)]`
	CROSSREFS	`A008472, A001405, A063958, A034444, A056169, A046098, A048243.` `Adjacent sequences: A064143 A064144 A064145 this_sequence A064147 A064148 A064149` `Sequence in context: A124182 A013585 A053653 this_sequence A028590 A074644 A130123`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Sep 11 2001`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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