Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A073636
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A073636 Digital root of n^3. +0
2
1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9, 1, 8, 9 (list; graph; listen)
OFFSET

1,2

COMMENT

Periodic with cycle {1,8,9}.

a(n) is the decimal expansion of 44/37 [From Barbarel Tres Mil (barbarel3000(AT)yahoo.es), Jul 28 2009]

FORMULA

a(n)=(1/3)*{14*[n mod 3]+5*[(n+1) mod 3]-[(n+2) mod 3]}, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Jun 08 2007

MATHEMATICA

n=3; su[x_] := Sum[IntegerDigits[x][[i]], {i, Length[IntegerDigits[x]]}]; Table[su[su[su[su[x^n]]]], {x, 100}]

CROSSREFS

Cf. A010888, A021596. Digital roots of squares are in A056992.

Sequence in context: A154904 A155553 A053463 this_sequence A113521 A030167 A010767

Adjacent sequences: A073633 A073634 A073635 this_sequence A073637 A073638 A073639

KEYWORD

nonn,base

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Sep 01 2002

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 December 4 15:11 EST 2009. Contains 170347 sequences.


AT&T Labs Research