-497

Appears in sequences

• a(n) = -(1/2)*(n+2)*(n^2 - 6*n - 1).at n=12A028494
• Numerators of coefficients in function a(x) such that a(a(x)) = log(1+x).at n=5A048607
• a(n+1) = a(n) - a(floor(n/2)), with a(0)=0, a(1)=1.at n=64A062187
• Matrix inverse of triangle A122178, where A122178(n,k) = C( n*(n+1)/2 + n-k - 1, n-k) for n>=k>=0.at n=31A121438
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A202875; by antidiagonals.at n=17A202877
• a(n) = Sum_{i=0..n-1} K(i,n)*i, where K(,) is Kronecker symbol.at n=70A228131
• Difference between sums of quadratic residues and non-residues modulo n that are coprime to n.at n=70A255643
• Difference between sums of quadratic residues and non-residues modulo n (residues are not necessarily coprime to n).at n=70A255644
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 427", based on the 5-celled von Neumann neighborhood.at n=17A272110
• Coefficients in the expansion of ([s] + [2s]x + [3s]x^2 + ...)/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = sqrt(3), s = r/(1-r).at n=23A279630
• Start with 2, then successively subtract the primes 3, 5, 7, ...at n=17A282329
• G.f.: Sum_{n=-oo..+oo} n * x^n * (1 - x^n)^n.at n=36A291937
• Expansion of g.f.: 1/Sum_{p prime} x^p.at n=15A352476