-129024

Appears in sequences

• Expansion of x(1-4x)/((1-2x)(1-8x^2)).at n=12A098656
• Triangle read by rows: nonzero coefficients of polynomials 2^n*E(n,x), with E the Euler polynomials.at n=38A099932
• a(n) is the determinant of an n X n Hermitian Toeplitz matrix whose first row consists of 1, 2*i, ..., n*i, where i denotes the imaginary unit.at n=21A359559