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A309550
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Sum of the odd parts in the partitions of n into 6 parts.
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0
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0, 0, 0, 0, 0, 0, 6, 5, 12, 15, 32, 39, 72, 92, 156, 198, 300, 380, 556, 683, 936, 1162, 1550, 1887, 2448, 2957, 3758, 4495, 5572, 6614, 8122, 9528, 11496, 13435, 16026, 18563, 21924, 25244, 29548, 33821, 39212, 44650, 51464, 58244, 66616, 75123, 85440
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OFFSET
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0,7
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LINKS
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FORMULA
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a(n) = Sum_{m=1..floor(n/6)} Sum_{l=m..floor((n-m)/5)} Sum_{k=l..floor((n-l-m)/4)} Sum_{j=k..floor((n-k-l-m)/3)} Sum_(i=j..floor((n-j-k-l-m)/2)} (i * (i mod 2) + j * (j mod 2) + k * (k mod 2) + l * (l mod 2) + m * (m mod 2) + (n-i-j-k-l-m) * ((n-i-j-k-l-m) mod 2)).
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MATHEMATICA
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Table[Sum[Sum[Sum[Sum[Sum[i * Mod[i, 2] + j * Mod[j, 2] + k * Mod[k, 2] + l * Mod[l, 2] + m * Mod[m, 2] + (n - i - j - k - l - m) * Mod[n - i - j - k - l - m, 2], {i, j, Floor[(n - j - k - l - m)/2]}], {j, k, Floor[(n - k - l - m)/3]}], {k, l, Floor[(n - l - m)/4]}], {l, m, Floor[(n - m)/5]}], {m, Floor[n/6]}], {n, 0, 100}]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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