68103

Appears in sequences

• Denominators of e.g.f.: -cot(arctanh(x)), odd powers only.at n=22A102065
• Denominators of e.g.f. sec(arccosh(x)) = cosec(arcsinh(x)).at n=22A102074
• a(n) = 841*n^2 - 2*n.at n=8A158401
• Total number of parts in all partitions of n with at least one distinct part.at n=30A220477
• Let s denote the sum of the deficient numbers in the aliquot parts of x. Sequence lists numbers x such that sigma(s) = usigma(x), where usigma(x) is the sum of the unitary divisors of x (A034448).at n=16A258134