-6936

Appears in sequences

• McKay-Thompson series of class 20d for Monster.at n=43A058559
• G.f.: (1+x^2)^2*(x^4-6*x^3+1)/(x^2-1)^4.at n=25A115046
• Expansion of q^(-1) * psi(-q) / psi(-q^3)^3 in powers of q where psi() is a Ramanujan theta function.at n=49A133637
• Expansion of psi(x^4) / phi(x) in powers of x where phi(), psi() are Ramanujan theta functions.at n=19A210063
• Expansion of q * f(-q,-q^7)^2 / (phi(q^2) * psi(-q)) in powers of q where phi(), psi(), f(,) are Ramanujan theta functions.at n=38A224216
• O.g.f.: exp( Sum_{n>=1} -(sigma(2*n^3) - sigma(n^3)) * (-x)^n/n ).at n=15A225957
• Expansion of f(-q^3, -q^5)^2 / (psi(-q) * phi(q^2)) in powers of q where phi(), psi(), f() are Ramanujan theta functions.at n=39A245432
• a(n) = Permanent(T(2*n + 1)) where T(n) is the tangent matrix defined in A346831. Bisection of A347598 (odd indices).at n=4A347597
• a(n) = permanent(T(n)), where T(n) is the tangent matrix defined in A346831 and n >= 1; by convention a(0) = 1.at n=9A347598
• a(n) = floor(f(n)), where f(n) = n^4*(15-24*n+10*n^2) + 20*n^5*(1-n)^3 / (1-2*n(1-n)).at n=5A356571