-134

Appears in sequences

• Expansion of exp(tan(log(1+x))).at n=6A009237
• 8th differences of primes.at n=16A036269
• Solutions t to the equation s*prime(n) + t*prime(n+1) = 1 with |s| as small as possible.at n=56A045893
• Sum_{d=1..n} phi(d)*mu(d).at n=55A054585
• Sum_{d=1..n} phi(d)*mu(d).at n=56A054585
• McKay-Thompson series of class 30C for Monster.at n=31A058614
• a(n) = 2*n*mu(n).at n=66A062004
• Alternating sum of primes: a(1) = A000040(1) = 2 and a(n) = a(n-1) + A000040(n)*(-1)^n for n > 1.at n=52A066033
• a(1) = 1, a(2n) = a(2n-1) + c(n) and a(2n+1) = a(2n) - p(n), where c(n)=A002808(n) and p(n)=A000040(n) are the n-th composite and n-th prime numbers, respectively.at n=35A073891
• Expansion of (1-x)^(-1)/(1+x^2-x^3).at n=32A077888
• Expansion of (1-x)/(1+x^2+x^3).at n=32A078032
• Real part of the sum of divisors function sigma(n) generalized for Gaussian integers.at n=67A103228
• Coefficients of the A-Rogers-Selberg identity.at n=35A104408
• Coefficients of the A-Bailey Mod 9 identity.at n=49A104467
• Row sums of triangle A104505, which is equal to the right-hand side of the triangle A084610 of coefficients in (1+x-x^2)^n.at n=8A104507
• Expansion of g.f. (1+x^2)/(1+x-x^3).at n=39A104770
• Expansion of x*(1+2*x^2-2*x^3+x^4) / ((x-1)*(x^2-2*x-1)*(x^2-x+1)*(x+1)^2).at n=6A109782
• Expansion of x(1-3x+x^2+x^3)/(1+x)^2.at n=34A113142
• A117000(n) + A117001(n).at n=66A117006
• a(1) = 1; a(2) = 1; a(3) = 1; a(4) = 1; a(5) = 1; a(n) = a(n-1)+4a(n-2)-3a(n-3)-3a(n-4)+a(n-5) for n >= 6.at n=11A122608