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Search: id:A022015
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A022015 a(n)=2a(n-1)+3a(n-2)+2a(n-3)+3a(n-4). +0
1
2, 6, 19, 61, 197, 633, 2036, 6548, 21061, 67737, 217861, 700699, 2253638, 7248306, 23312507, 74979305, 241153657, 775615161, 2494587424, 8023265560, 25804984685, 82995786381, 266936820209, 858540765611 (list; graph; listen)
OFFSET

0,1
CROSSREFS

Sequence in context: A022041 A018906 A014010 this_sequence A138747 A052975 A035929

Adjacent sequences: A022012 A022013 A022014 this_sequence A022016 A022017 A022018

KEYWORD

nonn

AUTHOR

R. K. Guy (rkg(AT)cpsc.ucalgary.ca)

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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