761995

Appears in sequences

• a(n) = triangular number whose index is the concatenation of the first n natural numbers.at n=3A077694
• Triangular numbers which are sums of three consecutive primes.at n=21A167788
• a(n) = Sum_{k=0..floor(n/3)} binomial(3*n-2*k,n-3*k).at n=8A371754