122360

Appears in sequences

• a(n) = smallest k having at least four prime divisors d such that (d + n) | (k + n).at n=3A202159
• G.f. A(x) satisfies A(x) = 1 + 4*x*A(x)^(5/2).at n=5A214553
• Numbers k with the property that it is possible to write the base 2 expansion of k as concat(a_2,b_2), with a_2>0 and b_2>0 such that, converting a_2 and b_2 to base 10 as a and b, we have a' * b' = k, where a' and b' are the arithmetic derivatives of a and b.at n=17A259675
• Where records occur in A348674.at n=25A349316