id:A047919 - OEIS Search Results

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Triangular array a(n,k) = Sum_{d|k} mu(d)*U(n,k/d)/n if k|n else 0, where U(n,k)=A047916(n,k) (1<=k<=n).

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1, 1, 0, 2, 0, 0, 2, 0, 0, 4, 4, 0, 0, 0, 20, 2, 4, 6, 0, 0, 108, 6, 0, 0, 0, 0, 0, 714, 4, 4, 0, 40, 0, 0, 0, 4992, 6, 0, 30, 0, 0, 0, 0, 0, 40284, 4, 16, 0, 0, 380, 0, 0, 0, 0, 362480, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3628790, 4, 8, 60, 312, 0, 3768, 0, 0, 0, 0 (list; table; graph; listen)

	OFFSET	`0,4`
	REFERENCES	`J. E. A. Steggall, On the numbers of patterns which can be derived from certain elements, Mess. Math., 37 (1907), 56-61.`
	CROSSREFS	`Divide n-th row of array A047918 by n.` `Sequence in context: A024164 A138805 A061897 this_sequence A101670 A118683 A112605` `Adjacent sequences: A047916 A047917 A047918 this_sequence A047920 A047921 A047922`
	KEYWORD	`nonn,tabl,nice,easy`
	AUTHOR	`njas`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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