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A026969
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a(n) = Sum{T(n,k)*T(n,k+3)}, 0<=k<=n-3, T given by A026637.
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0
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1, 10, 75, 372, 1796, 7796, 33352, 138790, 571995, 2334558, 9473195, 38258984, 153981400, 618042736, 2475405456, 9897862062, 39523226642, 157650156506, 628287555844
(list; graph; refs; listen; history; internal format)
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