-1287

Appears in sequences

• Expansion of log(1+tan(x))/exp(x).at n=6A009374
• Expansion of e.g.f. theta_3^(-9/2).at n=3A015685
• Triangle of binomial coefficients C(-n,k).at n=50A027555
• Consider the triangle in which the n-th row starts with n, contains n terms and the difference of successive terms is 1,2,3,... up to n-1. Sequence gives row sums.at n=21A081498
• Riordan array (1/(1+x)^3,x/(1+x)^2).at n=39A109954
• Inverse of A111526. Row sums have general term C(n,floor(n/2))*(cos(Pi*n/2) + sin(Pi*n/2)).at n=80A111527
• Inverse of twin-prime related triangle A111125.at n=22A113187
• Riordan array (1/(1+x)^3, x/(1+x)^3).at n=30A127895
• Riordan array (1/(1+x), x/(1+x)^2), inverse array is A039599.at n=49A129818
• Irregular triangle read by rows: the n-th row gives the coefficients of Phi(n, 1-x), where Phi(n, x) is the n-th cyclotomic polynomial.at n=63A140815
• Inverse of eigentriangle of triangle A085478.at n=59A186024
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A087062 based on (1,1,1,1,...); by antidiagonals.at n=49A202672
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of f(i,j)=(2i-1 if i=j and 1 otherwise) for i>=1 and j>=1 (as in A204131).at n=15A204134
• Values of n such that L(5) and N(5) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=46A226925
• Triangle read by rows: coefficients of the Laplacian polynomial of the n-cycle graph C_n.at n=49A284982
• First differences of A067046.at n=24A291681
• Irregular triangle read by rows: T(n, k) gives the coefficients of x^k of the minimal polynomials of the algebraic number over the rationals rho(n)^2, with rho(n) = 2*cos(Pi/n), for n >= 1.at n=74A334429
• Irregular triangle read by rows: T(m,k) gives the coefficients of x^k of the minimal polynomials of (2*cos(Pi/(2*m+1)))^2 = rho(2*n+1)^2, for m >= 0.at n=46A334432