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Search: id:A060823
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A060823 4-wave sequence beginning with 2's with middles dropped. +0
1
2, 2, 8, 20, 60, 170, 492, 1414, 4074, 11728, 33772, 97240, 279994, 806208, 2321386, 6684162, 19246280, 55417452, 159568196, 459458306, 1322957468, 3809304206, 10968454314, 31582405472, 90937912212, 261845282320, 753953441490 (list; graph; listen)
OFFSET

2,1

LINKS

F. v. Lamoen, Wave sequences

FORMULA

a(n)=2*a(n-1)+3*a(n-2)-a(n-3)-a(n-4) - Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 22 2003

CROSSREFS

Cf. A038197.

Sequence in context: A067640 A098277 A080040 this_sequence A130102 A113464 A054093

Adjacent sequences: A060820 A060821 A060822 this_sequence A060824 A060825 A060826

KEYWORD

easy,nonn

AUTHOR

Jason Earls (jcearls(AT)cableone.net), May 01 2001

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 22 2003

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Last modified July 4 18:25 EDT 2008. Contains 140886 sequences.


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