-1809

Appears in sequences

• Expansion of Product_{m>=1} ((1+q^(2*m-1))/(1+q^(2*m)))^3.at n=38A029840
• Signed array used for numerators of generating functions of the column sequences of array A090452.at n=39A091029
• For all n >= 2, Sum_{2<=k<=n, gcd(k,n)>1} a(k) = 1. a(1)=1.at n=83A124385
• Triangle read by rows: Polynomial coefficients per comment.at n=31A290053
• Inverse binomial transform of the number of overpartitions (A015128).at n=16A294499
• G.f. A(x) satisfies: A(x) = x*exp(A(-x) - A(-x^2)/2 + A(-x^3)/3 - A(-x^4)/4 + ...).at n=23A307366
• Inverse Euler transform applied once to {1,-1,0,0,0,...}, twice to {1,0,0,0,0,...}, or three times to {1,1,1,1,1,...}.at n=22A320767