This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A326452 #6 Jul 06 2019 20:58:45 %S A326452 0,0,0,0,0,0,0,0,1,2,5,5,13,19,34,40,60,80,121,147,208,253,350,417, %T A326452 563,651,863,1002,1299,1484,1888,2151,2678,3046,3729,4211,5110,5721, %U A326452 6868,7670,9142,10146,11996,13319,15606,17251,20084,22173,25708,28253,32522 %N A326452 Sum of the largest parts of the partitions of n into 8 squarefree parts. %H A326452 <a href="/index/Par#part">Index entries for sequences related to partitions</a> %F A326452 a(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)} mu(p)^2 * mu(o)^2 * mu(m)^2 * mu(l)^2 * mu(k)^2 * mu(j)^2 * mu(i)^2 * mu(n-i-j-k-l-m-o-p)^2 * (n-i-j-k-l-m-o-p), where mu is the Möbius function (A008683). %F A326452 a(n) = A326444(n) - A326445(n) - A326446(n) - A326447(n) - A326448(n) - A326449(n) - A326450(n) - A326451(n). %t A326452 Table[Sum[Sum[Sum[Sum[Sum[Sum[Sum[(n-i-j-k-l-m-o-p) * MoebiusMu[p]^2 * MoebiusMu[o]^2 * MoebiusMu[m]^2 * MoebiusMu[l]^2 * MoebiusMu[k]^2 * MoebiusMu[j]^2 * MoebiusMu[i]^2 * MoebiusMu[n - i - j - k - l - m - o - p]^2, {i, j, Floor[(n - j - k - l - m - o - p)/2]}], {j, k, Floor[(n - k - l - m - o - p)/3]}], {k, l, Floor[(n - l - m - o - p)/4]}], {l, m, Floor[(n - m - o - p)/5]}], {m, o, Floor[(n - o - p)/6]}], {o, p, Floor[(n - p)/7]}], {p, Floor[n/8]}], {n, 0, 50}] %Y A326452 Cf. A008683, A326443, A326444, A326445, A326446, A326447, A326448, A326449, A326450, A326451. %K A326452 nonn %O A326452 0,10 %A A326452 _Wesley Ivan Hurt_, Jul 06 2019