9568125

Appears in sequences

• Triangular numbers whose sum of primes from smallest to largest prime factor is triangular and whose sum of composites from smallest to largest prime factor is triangular.at n=5A076207
• a(n) is the largest triangular number that is prime(n)-smooth.at n=3A303339
• Number of nonisomorphic spanning trees of the triangular snake nC_3.at n=15A374721