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Search: id:A027295
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| A027295 |
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a(n) = Sum{T(n,k)*T(n,k+1)}, 0<=k<=m-1, where m=n for n=0,1 and m=[ (n+3)/2 ] for n >= 2, T given by A026022. |
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| 1, 4, 15, 52, 195, 676, 2555, 8976, 34098, 121448, 463067, 1669340, 6384287, 23251620, 89157557, 327523680, 1258803182, 4658150520, 17940605163, 66803546472, 257777882894, 965023761064
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