id:A047919 - OEIS Search Results

Search: id:A047919

Displaying 1-1 of 1 results found.

page 1

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).

+0
1

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 A161116` `Adjacent sequences: A047916 A047917 A047918 this_sequence A047920 A047921 A047922`
	KEYWORD	`nonn,tabl,nice,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

page 1

Search completed in 0.002 seconds

Last modified November 24 19:42 EST 2009. Contains 167435 sequences.

AT&T Labs Research