-2028
domain: Z
Appears in sequences
- Coefficients of x/(1+3*x+3*x^2-x^3).at n=12A108369
- Sequence is {a(5,n)}, where a(m,n) is defined at sequence A110665.at n=14A110670
- Expansion of s(q)^4 in powers of q where s() is a cubic AGM function.at n=9A133078
- a(n) = Pell(n)*A122859(n) for n>=1, with a(0)=1, where A122859 lists the coefficients in phi(-q)^3/phi(-q^3) and phi() is a Ramanujan theta function.at n=7A209452
- Discriminant of the pure cubic field Q(m^(1/3)), where m = A004709(n) is the n-th cubefree number.at n=22A242867
- Expansion of Sum_{k>0} x^(4*k)/(1+x^k)^4.at n=24A363616
- Partial alternating sums of the sigma_2 function: a(n) = Sum_{k=1..n} (-1)^(k+1) * sigma_2(k).at n=29A379921