79459

Appears in sequences

• Crystal ball sequence for A_8 lattice.at n=4A008392
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 97 ones.at n=2A031865
• Quotient of de Bruijn sums S(4,n)/S(2,n).at n=4A099601
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+521)^2 = y^2.at n=10A129725
• G.f.: A(x,y,z) = Sum_{n>=0} ((2n)!/n!^2)*[Sum_{k=0..2n} T(n,k)*z^k]*x^(2n)*y^n/(1-x-xy)^(4n+1) where A(x,y,x+xy) = Sum_{n>=0, k=0..n} C(n,k)^4*x^n*y^k at z = x+xy; this is the triangle of coefficients T(n,k), read by rows.at n=16A187056
• Array a(m,n) (m>0, n>=0) of quotient of de Bruijn alternating sums of m-th powers of binomial coefficients, listed by ascending antidiagonals.at n=32A257050
• a(n) = [x^n] 2 / (1 + x*(2*x + 3) + sqrt((x + 1)*(1 - 3*x))). Alternating row sums of A379907.at n=16A379824