85320

Appears in sequences

• a(n) = 1^2 + 3^2 + 5^2 + 7^2 + ... + (2*n-1)^2 = n*(4*n^2 - 1)/3.at n=40A000447
• Dodecahedral numbers: a(n) = n*(3*n - 1)*(3*n - 2)/2.at n=27A006566
• Binomial coefficients C(n,78).at n=3A017742
• Binomial coefficients C(81,n).at n=3A017797
• a(n) = 3^n*(3^n-1)*(3^n-2)/6.at n=4A026809
• (prime(n)-5)(prime(n)-7)(prime(n)-9)/48.at n=36A030002
• a(n) = (prime(n) - 1)*(prime(n) - 3)*(prime(n) - 5)/48.at n=36A030004
• a(n) = binomial(n^4, n).at n=3A107446
• Array read by antidiagonals: A(k,n) = C(n^k, n).at n=24A108131
• Sequence related to Hankel transform of super-ballot numbers.at n=38A156126
• Number of ways to choose three points in an (n X n)-grid (or geoplane).at n=8A178208
• Quarter-square tetrahedrals: a(n) = k*(k - 1)*(k - 2)/6, k = A002620(n).at n=18A217482
• a(n) = (32*n^3 - 2*n)/3.at n=20A267031
• Triangle read by rows: T(n,k) = binomial(n*k,3) (0 <= k <= n).at n=54A334703
• Smallest tetrahedral number m*(m+1)*(m+2)/6 that is divisible by n.at n=26A345989
• Smallest tetrahedral number m*(m+1)*(m+2)/6 that is divisible by n.at n=53A345989
• a(n) = A000292(6*n + 1) where A000292 are the tetrahedral numbers.at n=13A349682