49021

Appears in sequences

• Numbers x such that sigma(x)=sigma(T(x)), where sigma(x) is the sum of the divisors of x and T(x) the transform defined in A243993.at n=18A245468
• Unary-binary representation of Stern polynomials: a(n) = A156552(A260443(n)).at n=43A277020
• Odd bisection of A277020: a(n) = A277020(2n+1).at n=21A277189
• Nearest integer to the product of all integer roots of n from the second to the n-th.at n=32A330153