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A059620 Colors of the 88 keys of the standard piano: white keys = 0, black keys = 1, start with A0 = the 0th key. 7
0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
FORMULA
a(n) = floor((5n+7)/12) - floor((5n+2)/12). - David W. Wilson, Mar 02 2003
G.f.: -x*(1+x^3+x^5+x^8+x^10) / ( (x-1) *(1+x+x^2) *(1+x) *(1-x+x^2) *(1+x^2) *(x^4-x^2+1) ). - R. J. Mathar, Dec 16 2016
a(n) = 0 if n is in A060107, a(n) = 1 if n is in A060106. - Jianing Song, Oct 14 2019
EXAMPLE
.1..1.1..1.1.1..1.1..1.1.1..1.1..1.1.1..1.1..1.1.1..1.1..1.1.1..1.1..1.1.1..1.1..1.1.1
0.00.0.00.0.0.00.0.00.0.0.00.0.00.0.0.00.0.00.0.0.00.0.00.0.0.00.0.00.0.0.00.0.00.0.0.00
MATHEMATICA
Flatten[Table[{0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1}, {8}]][[1 ;; 88]] (* Jean-François Alcover, Apr 24 2017 *)
PadRight[{}, 88, {0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 1}] (* Harvey P. Dale, Sep 14 2020 *)
CROSSREFS
Sequence in context: A188034 A115199 A085242 * A188014 A288600 A284468
KEYWORD
easy,fini,full,nonn,nice
AUTHOR
Naohiro Nomoto, Feb 19 2001
STATUS
approved

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Last modified March 19 01:34 EDT 2024. Contains 370952 sequences. (Running on oeis4.)