-65

Appears in sequences

• The negative integers.at n=64A001478
• Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^5 in powers of x.at n=34A001483
• Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^5 in powers of x.at n=28A001483
• Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^6 in powers of x.at n=6A001484
• a(n) = -n.at n=65A001489
• Generalized sum of divisors function: excess of sum of odd divisors of n over sum of even divisors of n.at n=35A002129
• Coefficients of period polynomials.at n=4A006309
• Elliptic divisibility sequence associated with elliptic curve "37a1": y^2 + y = x^3 - x and multiples of the point (0,0).at n=16A006769
• Expansion of e.g.f. cos(x)/(1+x).at n=5A009102
• Expansion of tanh(log(1+x)*cosh(x)).at n=5A009784
• Expansion of tanh(log(1+x)*exp(x)).at n=6A009785
• Expansion of Product_{k>=1} (1 - x^k)^13.at n=4A010820
• Imaginary Rabbits: imaginary part of a(0)=i; a(1)=-i; a(n) = a(n-1) + i*a(n-2), with i = sqrt(-1).at n=15A014291
• a(n) = n*(-1)^n.at n=65A038608
• Triangle T(n,k), for n >= 1, 1 <= k <= n, read by rows, giving coefficient of x^n in expansion of (Product_{j>=1} (1-(-x)^j) - 1 )^k.at n=71A047265
• Matrix 10th power of inverse partition triangle A038498.at n=6A050313
• Divisibility sequence associated with elliptic curve y^2 + y = x^3 - x and point (1, 0).at n=8A051138
• Numerators in expansion of 1/(10+sqrt(36+x)).at n=3A051550
• Consider real quadratic fields of ERD-type with class groups of exponent 2 and discriminants of the form D = r^2*k^2+4k, k odd; sequence gives values of k.at n=39A051998
• Second differences of sigma(n).at n=22A053223