274170

Appears in sequences

• Tritriangular numbers: a(n) = binomial(binomial(n,2),2) = n*(n+1)*(n-1)*(n-2)/8.at n=39A050534
• Consider 2n tennis players; a(n) is the number of matches needed to let every possible pair play each other.at n=18A062346
• a(n) = rad(n*(n+1)*(n+2)*(n+3)).at n=36A078638
• 32*a(n) is the denominator of the squared circumradius of a cyclic quadrilateral with sides n, n+1, n+2, n+3.at n=36A351697
• Triangular numbers which are products of six distinct primes.at n=2A362758