Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A007557
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A007557 Shifts left when inverse Moebius transform applied twice.
(Formerly M2458)
+0
2
1, 1, 3, 5, 10, 12, 24, 26, 43, 52, 78, 80, 133, 135, 189, 219, 295, 297, 428, 430, 584, 642, 804, 806, 1100, 1123, 1395, 1494, 1856, 1858, 2428, 2430, 2977, 3143, 3739, 3811, 4790, 4792, 5654, 5930, 7072, 7074, 8656 (list; graph; listen)
OFFSET

1,3

COMMENT

Equals eigensequence of triangle A127170 (the square of the inverse Mobius transform). [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Apr 27 2009]

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

M. Bernstein and N. J. A. Sloane, Some canonical sequences of integers, Linear Alg. Applications, 226-228 (1995), 57-72; erratum 320 (2000), 210.

N. J. A. Sloane, Transforms

FORMULA

a(n+1) = Sum_{d divides n} tau(n/d)*a(d). - Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 24 2003

CROSSREFS

Cf. A000005, A007554, A038045, A038046, A003238, A070965.

A127170 [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Apr 27 2009]

Sequence in context: A047389 A093661 A080561 this_sequence A034746 A080931 A165718

Adjacent sequences: A007554 A007555 A007556 this_sequence A007558 A007559 A007560

KEYWORD

nonn,nice,eigen

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 24 2003

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 November 25 20:09 EST 2009. Contains 167514 sequences.


AT&T Labs Research