425808

Appears in sequences

• Numbers k such that k^2 + 1 is divisible by precisely four distinct primes where the sum of the largest and the smallest is equal to the sum of the other two.at n=9A192770
• Numbers k such that the sum of the largest and the smallest prime divisor of k^2 + 1 equals the sum of the other distinct prime divisors.at n=23A199924
• Numbers n > 1 such that the sum of the distinct prime divisors of n^2 + 1 that are congruent to 1 mod 8 equals the sum of the distinct prime divisors congruent to 5 mod 8.at n=15A215950
• Expansion of e.g.f. 1/(1 + log(1 + log(1 - x))).at n=7A305323