5581440

Appears in sequences

• a(n) = n*(n+1)*(n+2)*(n+3)*(n+4)*(n+5)/5.at n=15A162669
• Numbers k for which k * gcd(sigma(k), A003961(k)) is equal to sigma(k) * gcd(k, A003961(k)), where A003961 shifts the prime factorization one step towards larger primes, and sigma is the sum of divisors function.at n=10A349745
• a(n) = 3*(3*n+2)!/(2*n+3)!.at n=6A370055