100880

Appears in sequences

• a(n) = n*(n+1)*(n+2)*(n^2+7*n+32)/120.at n=23A051747
• A sequence derived from pentagonal numbers, or a Stirling number of the first kind matrix.at n=31A094952
• Floor(1/{(9+n^4)^(1/4)}), where {} = fractional part.at n=60A184633
• Least positive integer x such that x and n*x are both differences of fourth powers.at n=20A228760
• Number of 3-regular bipartitions of n.at n=30A328547