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%I #9 Jul 11 2019 02:13:34
%S 0,0,0,0,0,0,0,0,0,1,1,2,3,5,7,11,16,24,34,47,64,88,117,157,206,271,
%T 349,451,572,727,914,1145,1422,1764,2167,2657,3237,3932,4747,5720,
%U 6851,8191,9744,11563,13664,16115,18924,22179,25904,30190,35071,40666,47006
%N Sum of the seventh largest parts in the partitions of n into 9 parts.
%H <a href="/index/Par#part">Index entries for sequences related to partitions</a>
%F a(n) = Sum_{q=1..floor(n/9)} Sum_{p=q..floor((n-q)/8)} Sum_{o=p..floor((n-p-q)/7)} Sum_{m=o..floor((n-o-p-q)/6)} Sum_{l=m..floor((n-m-o-p-q)/5)} Sum_{k=l..floor((n-l-m-o-p-q)/4)} Sum_{j=k..floor((n-k-l-m-o-p-q)/3)} Sum_{i=j..floor((n-j-k-l-m-o-p-q)/2)} o.
%F a(n) = A326464(n) - A326465(n) - A326466(n) - A326468(n) - A326469(n) - A326470(n) - A326471(n) - A326472(n) - A326473(n).
%t Table[Sum[Sum[Sum[Sum[Sum[Sum[Sum[Sum[o, {i, j, Floor[(n - j - k - l - m - o - p - q)/2]}], {j, k, Floor[(n - k - l - m - o - p - q)/3]}], {k, l, Floor[(n - l - m - o - p - q)/4]}], {l, m, Floor[(n - m - o - p - q)/5]}], {m, o, Floor[(n - o - p - q)/6]}], {o, p, Floor[(n - p - q)/7]}], {p, q, Floor[(n - q)/8]}], {q, Floor[n/9]}], {n, 0, 50}]
%Y Cf. A026815, A326464, A326465, A326466, A326468, A326469, A326470, A326471, A326472, A326473.
%K nonn
%O 0,12
%A _Wesley Ivan Hurt_, Jul 10 2019
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