109850

Appears in sequences

• Numbers k that divide 9^k + 7^k.at n=30A045605
• Numbers n that are the hypotenuse of exactly 17 distinct integer-sided right triangles, i.e., n^2 can be written as a sum of two squares in 17 ways.at n=9A097239
• Row sums of triangle A120073 (denominator triangle for H atom spectrum).at n=11A120075
• a(n) = floor(1/{(10+n^4)^(1/4)}), where {}=fractional part.at n=64A184634
• Fixed points of A153212: After a(1) = 1, numbers of the form p_i1^i1 * p_i2^(i2-i1) * p_i3^(i3-i2) * ... * p_ik^(ik-i_{k-1}), where p_i's are distinct primes present in the prime factorization of n, with i1 < i2 < i3 < ... < ik, and k = A001221(n) and ik = A061395(n).at n=48A242421
• For any number n with binary expansion Sum_{k = 1..m} 2^e_k (where 0 <= e_1 < ... < e_m), a(n) = Product_{k = 1..m} prime(1+e_k)^k (where prime(k) denotes the k-th prime number).at n=37A344530