-16128

Appears in sequences

• Expansion of tanh(x)*cosh(log(1+x)).at n=8A009827
• a(n) = 4^n - n^7.at n=4A024043
• Triangle L, read by rows, equal to the matrix log of A118435, with the property that L^2 consists of a single diagonal (two rows down from the main diagonal).at n=47A118441
• Triangle T, read by rows, where g.f. of row n of matrix power T^(2^n) = (2^(2n-1) + y)*y^(n-1) for n>0.at n=25A152790
• Triangle read by rows: terms T(n,k) of a binomial decomposition of n as Sum(k=0..n)T(n,k).at n=39A244133
• Triangular array read by rows: row n shows the coefficients of this polynomial of degree n: (1/n!)*(numerator of n-th derivative of 1)/(1-x-2x^2).at n=42A328650
• a(1) = 1, a(2) = 3; a(n) = n^2 * Sum_{d|n, d < n} (-1)^(n/d) a(d) / d^2.at n=47A361986