637659

Appears in sequences

• Number x such that usigma(x) = (-1)sigma(x), where usigma(x) is the sum of unitary divisors of x (A034448) and (-1)sigma(x) is defined in A049060 .at n=18A258101
• Expansion of (1/x) * Series_Reversion( x*(1-x)^3/(1-x-x^4) ).at n=9A366089