252005

Appears in sequences

• a(n) = (x(n)^2 + 1)/m(n), with m(n) = A002559(n) (Markoff numbers) and x(n)= A324601(n), for n >= 3. The Markoff uniqueness conjecture is assumed to be true.at n=42A309161
• Sum over all multiplicative partitions mu of n whose sum is also n (with factors >= 1), of the encoding as Product_{j in mu} prime(j).at n=25A377853