-3670016

Appears in sequences

• Triangle read by rows. T(n, m) are the coefficients of Sidi polynomials.at n=39A075513
• a(n) = - 2*a(n-1) - 8*a(n-3), a(0) = 1, a(1) = 1, a(2) = -2.at n=18A106603