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Search: id:A107394
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OFFSET
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0,1
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EXAMPLE
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If n=0 then C(0+2,2)*C(0+4,2)= C(2,2)*C(4,2)=1*6=6
If n=4 then C(4+2,2)*C(4+4,2)= C(6,2)*C(8,2)=15*28=420
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CROSSREFS
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Cf. A062196.
Sequence in context: A094143 A009775 A119536 this_sequence A033487 A061138 A073948
Adjacent sequences: A107391 A107392 A107393 this_sequence A107395 A107396 A107397
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KEYWORD
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easy,nonn
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AUTHOR
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Zerinvary Lajos (zlaja(AT)freemail.hu), May 25 2005
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