147875

Appears in sequences

• a(n) = 10*a(n-1) - 15*a(n-2), a(0)=1, a(1)=5.at n=6A084135
• 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=13A097239
• Integer areas of the tangential triangles corresponding to the integer-sided triangles with integer areas.at n=5A230361
• 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=51A242421
• Odd numbers k such that k divides A163511(k).at n=19A364495