1567335

Appears in sequences

• a(n) = n*(n^2 - 1)*(n + 2)*(n^2 + 4*n + 6)/72.at n=21A054563
• a(1)=1, a(n)= least odd triangular number which is a proper multiple of a(n-1) with a multiplier different from the ones used earlier.at n=6A088109
• Integers that are Rhonda numbers to base 4.at n=26A100968
• Least triangular number t such that t = prime(n)*triangular(m) for some m>0, or 0 if no such t exists.at n=16A225503
• Triangular numbers which are products of six distinct primes.at n=25A362758