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A060827
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3-wave sequence beginning with 2's.
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0
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2, 2, 2, 4, 6, 10, 12, 22, 28, 50, 62, 112, 140, 252, 314, 566, 706, 1272, 1586, 2858, 3564, 6422, 8008, 14430, 17994, 32424, 40432, 72856, 90850, 163706, 204138, 367844, 458694, 826538, 1030676, 1857214, 2315908, 4173122, 5203798, 9376920
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| The 3-wave sequence with initial values a, b, c is formed by the following construction:
a.......a+b+c............3a+5b+6c...
..b...b+c...a+2b+2c..2a+4b+5c...
....c..........a+2b+3c...
Dropping middle row gives A052994.
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LINKS
| F. v. Lamoen, Wave sequences
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FORMULA
| G.f.: (-2x^2+2x+2)/(x^6-x^4-2x^2+1).
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CROSSREFS
| Cf. A038196.
Sequence in context: A036654 A191651 A010558 * A188288 A064355 A000799
Adjacent sequences: A060824 A060825 A060826 * A060828 A060829 A060830
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KEYWORD
| easy,nonn
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Apr 30 2001
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EXTENSIONS
| More terms from Larry Reeves (larryr(AT)acm.org), May 10 2001
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