750925

Appears in sequences

• a(n) = n^2*(n^2 + 1)/2.at n=35A037270
• Row sums of the triangle A045975.at n=34A204558
• Triangular numbers whose sum of triangular divisors is also triangular and greater than 1.at n=9A209310
• Number of 2 X 2 matrices with all terms in {0,1,...,n} and even trace.at n=34A210378
• Least triangular number representable as a sum of n consecutive triangular numbers, or -1 if no such triangular number exists.at n=48A238017
• Triangular numbers that are the product of a square number and a prime number.at n=36A253653
• a(n) = (n^2 + (n+1)^2)*(n^2 + (n+1)^2 + 2*n*(n+1)).at n=17A272850