18988

Appears in sequences

• Numbers n such that the sum of the inverse of the exponents in the binary expansion of 2n is the inverse of an integer.at n=28A272034
• Numbers n such that the sum of the inverse of the exponents in the binary expansion of 2n is an integer.at n=10A272035
• Numbers n such that the sum of the inverse of the exponents in the binary expansion of 2n is equal to 1.at n=5A272036
• Sum of all the parts in the partitions of n into 5 squarefree parts.at n=47A308839
• Decimal numbers m such that the product of the binary string of m and the binary string of m in reverse contains the binary string of m as a substring.at n=37A342130
• a(n) = Sum_{k=0..n} binomial(2*n, k) * p(k), where p(k) is the partition function A000041.at n=6A356267
• Least k such that k*M(n)*M(n+4) + 1 is prime, where M(n) = A000668(n).at n=17A365065