-121

Appears in sequences

• Coefficients of modular function G_3(tau).at n=25A005761
• Expansion of log(1+sin(x))/cos(x).at n=6A009335
• Expansion of log(1+sinh(x))*cos(x).at n=6A009351
• Expansion of e.g.f.: log(1+tanh(x))/cosh(x).at n=6A009392
• sech(arcsin(tan(x)))=1-1/2!*x^2-7/4!*x^4-121/6!*x^6-5167/8!*x^8...at n=3A012086
• cos(arcsin(sinh(x))) = 1-1/2!*x^2-7/4!*x^4-121/6!*x^6-5167/8!*x^8...at n=3A012103
• Expansion of q^(-1/2) * (eta(q) * eta(q^2))^4 in powers of q.at n=12A030211
• Numerator of Bernoulli(2n,1/3).at n=3A033470
• Coefficients of the '6th-order' mock theta function psi(q).at n=38A053269
• Coefficients of the '10th-order' mock theta function chi(q).at n=60A053284
• Expansion of g.f. Product_{n>=1} (1-x^n)*(1-x^(5*n))/(1-x^(3*n))^2.at n=25A054274
• Expansion of (1-x-x^N)/((1-x)(1-x^2)(1-x^3)...(1-x^N)) for N = 6.at n=24A060025
• Expansion of (1-x-x^N)/((1-x)(1-x^2)(1-x^3)...(1-x^N)) for N = 7.at n=25A060026
• Generalized sum of divisors function: second diagonal of A060184.at n=70A060185
• a(n) = L(n)*C(n), L(n)=Lucas numbers (A000032), C(n)=reflected Lucas numbers (see comment to A061084).at n=5A075150
• a(n) = (-1)^n * (3^n - 1)/2.at n=5A076040
• a(n) = A077110(n) - n^2.at n=43A077111
• 5th differences of partition numbers A000041.at n=30A081095
• Alternating partial sums of A000217.at n=21A083392
• Riordan array (((1+x)^2 - x^3)/(1+x)^3, 1/(1+x)).at n=62A099569