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A308989
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Sum of all the parts in the partitions of n into 8 parts.
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9
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0, 0, 0, 0, 0, 0, 0, 0, 8, 9, 20, 33, 60, 91, 154, 225, 352, 493, 720, 988, 1400, 1869, 2552, 3358, 4464, 5750, 7488, 9504, 12152, 15225, 19140, 23684, 29408, 35970, 44098, 53445, 64836, 77848, 93556, 111423, 132760, 156948, 185514, 217838, 255728, 298350
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OFFSET
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0,9
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LINKS
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FORMULA
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a(n) = n * Sum_{p=1..floor(n/8)} Sum_{o=p..floor((n-p)/7)} Sum_{m=o..floor((n-o-p)/6)} Sum_{l=m..floor((n-m-o-p)/5)} Sum_{k=l..floor((n-l-m-o-p)/4)} Sum_{j=k..floor((n-k-l-m-o-p)/3)} Sum_{i=j..floor((n-j-k-l-m-o-p)/2)} 1.
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MATHEMATICA
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Table[Total[Flatten[IntegerPartitions[n, {8}]]], {n, 0, 50}] (* Harvey P. Dale, Jan 12 2022 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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