-301

Appears in sequences

• Expansion of e.g.f. cos(x/cosh(x)) (even powers only).at n=3A009119
• Expansion of log(1+tan(x))*cos(x).at n=6A009369
• cos(arcsin(tan(x)))=1-1/2!*x^2-11/4!*x^4-301/6!*x^6-16631/8!*x^8...at n=3A012079
• sech(tan(arctanh(x)))=1-1/2!*x^2-11/4!*x^4-301/6!*x^6-14839/8!*x^8...at n=3A012184
• a(n) = floor(Sum_{k=0..n} tan(k)).at n=51A051508
• a(n) = floor(Sum_{k=0..n} tan(k)).at n=49A051508
• a(n) = round(Sum_{k=0..n} tan(k)).at n=49A051509
• a(n) = round(Sum_{k=0..n} tan(k)).at n=36A051509
• a(n) = round(Sum_{k=0..n} tan(k)).at n=50A051509
• a(n) = ceiling(Sum_{k=0..n} tan(k)).at n=36A051510
• a(n) = ceiling(Sum_{k=0..n} tan(k)).at n=50A051510
• a(n) = ceiling(Sum_{k=0..n} tan(k)).at n=38A051510
• (1/18)*Difference between concatenation of n and n^2 and concatenation of n^2 and n.at n=13A055435
• Denominators of continued fraction for left factorial.at n=17A056890
• McKay-Thompson series of class 46A for the Monster group.at n=63A058688
• Expansion of x*(1 - x)/(1 - x + x^2)^3.at n=41A104555
• Riordan array (1/(1+x), x(1-x)/(1+x)^2).at n=30A110511
• Triangle T, read by rows, equal to the matrix product T = H*C*H, where H is the self-inverse triangle A118433 and C is Pascal's triangle.at n=29A118438
• Generalized Pascal's triangle made using Mod[(Prime[n] - 1)/2, 4] == 2 primorial-like Stirling polynomials.at n=33A119724
• Irregular triangle formed by coefficients of polynomials defined by P(n,k,x) = f(n,k)*(2*x)^k*(1 - x^2)^(n - k), where f(n, k) = (-1)^floor((k + 1)/2)* binomial(n - floor((k + 1)/2), floor(k/2)).at n=59A123218