id:A047918 - OEIS Search Results

Search: id:A047918

Displaying 1-1 of 1 results found.

page 1

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

+0
6

1, 2, 0, 6, 0, 0, 8, 0, 0, 16, 20, 0, 0, 0, 100, 12, 24, 36, 0, 0, 648, 42, 0, 0, 0, 0, 0, 4998, 32, 32, 0, 320, 0, 0, 0, 39936, 54, 0, 270, 0, 0, 0, 0, 0, 362556, 40, 160, 0, 0, 3800, 0, 0, 0, 0, 3624800, 110, 0, 0, 0, 0, 0, 0, 0, 0, 0, 39916690, 48, 96 (list; table; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`J. E. A. Steggall, On the numbers of patterns which can be derived from certain elements, Mess. Math., 37 (1907), 56-61.`
	CROSSREFS	`Sequence in context: A137260 A153059 A151336 this_sequence A138701 A050821 A076257` `Adjacent sequences: A047915 A047916 A047917 this_sequence A047919 A047920 A047921`
	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 December 20 16:54 EST 2009. Contains 171081 sequences.

AT&T Labs Research