319600

Appears in sequences

• a(n) = n^2*(2*n^2 - 1); also Sum_{k=0..n-1} (2k+1)^3.at n=20A002593
• Triangular numbers k*(k+1)/2 such that A068865(k) = k*(k+1)/2.at n=30A068866
• Triangular numbers which are 8-almost primes.at n=27A076582
• Transform of n^3 by the Riordan array (1/(1-x^2), x).at n=39A105636
• n+sigma(n)+sigma(sigma(n)) is a cube.at n=10A116013
• Triangular numbers which are sums of 4 consecutive primes.at n=23A173420
• Triangular arithmetic on half-squares: b(n)*(b(n) - 1)/2 where b(n) = floor(n^2/2).at n=40A227970