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A099237
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Sum C(n(n-k),k), k=0..n.
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1
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1, 1, 3, 10, 45, 251, 1624, 11908, 97545, 880660, 8664546, 92096731, 1050304775, 12778138842, 165033693175, 2253204163256, 32401745953105, 489207829112931, 7733130368443057, 127664099576228184, 2196149923000824756
(list; graph; refs; listen; history; internal format)
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