Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A047919
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A047919 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 A112605

Adjacent sequences: A047916 A047917 A047918 this_sequence A047920 A047921 A047922

KEYWORD

nonn,tabl,nice,easy

AUTHOR

njas

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

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


AT&T Labs Research