-4097

Appears in sequences

• Coefficient of q^(2n) in the series expansion of Ramanujan's mock theta function f(q).at n=38A000039
• Expansion of q^(-1/24) (m (1-m) / 16)^(1/24) in powers of q, where m = k^2 is the parameter and q is the nome for Jacobian elliptic functions.at n=51A081360
• a(n) is the n-th term of sequence A_n, ignoring the offset, or -1 if A_n has fewer than n terms.at n=38A091967
• Expansion of (1 + x - x^2)/((1 + x)*(1 + 2*x)).at n=13A248155
• a(n) = Sum_{d divides n} (-1)^(d + n/d) * d^12.at n=1A321809
• Dirichlet inverse of function f(n) = 1 + A048675(n), where A048675(n) is fully additive with a(p) = 2^(1-PrimePi(p)).at n=40A359795
• Dirichlet inverse of A005941.at n=40A364574