400010

Appears in sequences

• a(n) = n*(4*n^4 + 1).at n=10A069078
• Full Łukasiewicz word for each rooted plane tree (interpretation e in Stanley's exercise 19) encoded by A014486 (or A063171).at n=24A079436
• Consider a number k with m decimal digits, the prefix p of length m-1 and the suffix s of length m-1. The sequence lists the numbers k such that sigma(k) = sigma(p)*sigma(s) where sigma(x) is the sum of the divisors of x.at n=36A244313
• Numbers n such that sum of decimal digits of n equals number of prime divisors of n counted with multiplicity and sum of distinct decimal digits of n equals number of distinct primes dividing n.at n=28A280911