-1020

Appears in sequences

• Expansion of e.g.f.: cos(log(1+x)^2).at n=6A009035
• Expansion of e.g.f.: sech(log(x+1)*log(x+1)).at n=6A012274
• a(n) = 2^n - n^10.at n=2A024020
• Column with index 3 of triangle A096651: a(n) = A096651(n+3,3).at n=7A096643
• Lower triangular matrix T, read by rows, such that the row sums of T^n form the n-dimensional partitions.at n=58A096651
• Riordan array (1-u, u) where u=(-1 + sqrt(1+8*x))/4.at n=51A110292
• Triangle read by rows: row n gives coefficients of increasing powers of x in characteristic polynomial of the matrix (-1)^n*M_n, where M_n is the tridiagonal matrix defined in the Comments line.at n=41A124037
• Triangle read by rows: matrix inverse of A110877.at n=41A126126
• a(n) = a(n-2) - (a(n-1) - a(n-2)) if (n mod 2) = 0, otherwise a(n) = a(n-1) - (a(n-3) - a(n-4)), with a(0) = 0, a(1) = 1, a(2) = -1, a(3) = 2.at n=32A135690
• a(n) = a(n-2) - (a(n-1) - a(n-2)) if (n mod 2) = 0, otherwise a(n) = a(n-1) - (a(n-3) - a(n-4)), with a(0) = 0, a(1) = 1, a(2) = -1, a(3) = 2.at n=39A135690
• a(n) = 2n(19-n).at n=34A182428
• Triangle of coefficients of Gaussian polynomials [2n+5,5]_q represented as finite sum of terms (1+q^2)^k*q^(g-k), where k = 0,1,...,g with g=5n.at n=73A267485
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 4", based on the 5-celled von Neumann neighborhood.at n=31A269880
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 299", based on the 5-celled von Neumann neighborhood.at n=19A271155
• Deficiency computed for conjugated prime factorization: a(n) = A033879(A122111(n)).at n=57A323174
• a(n) = A033879(A225546(n)).at n=55A331734
• a(n) is the largest power of n such that all numbers n^k <= a(n), k=1,..,A336778(n)-1 can be exactly represented as double precision 64-bit floating point numbers according to the IEEE 754 standard. If a(n) is a power of 2, it is replaced by the corresponding negated exponent of 2.at n=14A336779
• Triangle read by rows: Riordan array (2 - D(x), x * D(x)) where D(x) is g.f. of A001764.at n=29A380191