-4048

Appears in sequences

• Sum_{k=1..n-1} J(2*n,k)*k^2, where J(i,j) is the Jacobi symbol.at n=43A097543
• Sum_{k=1..2n-1} J(4*n,k)*k^2, where J(i,j) is the Jacobi symbol.at n=21A097544
• Triangle read by rows of coefficients of Chebyshev-like polynomials P_{n,3}(x) with 0 omitted (exponents in increasing order).at n=46A136389
• Expansion of ((1-4*x) + sqrt(1-4*x))/(2*(1-2*x)).at n=9A158495
• Expansion of r(q)^2 / r(q^2) in powers of q where r() is the Rogers-Ramanujan continued fraction.at n=46A285349
• G.f.: A(x) = Sum_{n>=0} binomial(2*(n+1), n)/(n+1) * x^n / (1+x)^(3*(n+1)).at n=21A316987
• a(n) = n - 2^(sum of digits of n).at n=48A328882
• a(n) = n - A332215(n).at n=45A364253