84824

Appears in sequences

• a(0) = -1; a(1) = 0; a(2) = 1; a(3) = -1; a(n) = a(n-1) - 3*a(n-2) + 3*a(n-3) - a(n-4).at n=26A141577
• Number of 2 X 2 matrices having all terms in {1,...,n} and determinant in the closed interval [0,n].at n=35A211057
• a(n) = ceiling(Pi*n^3).at n=30A247194
• Numbers k such that k^2, (k+1)^2 and (k+2)^2 are all abundant numbers.at n=27A383391