login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A081031 Positions of white keys on piano keyboard. 2
1, 3, 4, 6, 8, 9, 11, 13, 15, 16, 18, 20, 21, 23, 25, 27, 28, 30, 32, 33, 35, 37, 39, 40, 42, 44, 45, 47, 49, 51, 52, 54, 56, 57, 59, 61, 63, 64, 66, 68, 69, 71, 73, 75, 76, 78, 80, 81, 83, 85, 87, 88 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

FORMULA

a(n) = [(12n-3)/7]

EXAMPLE

First, 3rd, 4th, 6th, etc. keys of piano keyboard are white.

CROSSREFS

Cf. A059620, A081032.

Sequence in context: A061402 A047206 A187474 * A133280 A138097 A193732

Adjacent sequences:  A081028 A081029 A081030 * A081032 A081033 A081034

KEYWORD

fini,full,nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net), Mar 02 2003

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 17 12:38 EST 2012. Contains 206021 sequences.