explicit 15-stage Runge-Kutta method of order 10

The format is 15 numbers for the nodes column vector c, 15 numbers for the weights row vector b, and 1 + 2 + 3 + ... + 14 = 105 numbers for below the diagonal part of the coefficients matrix A, row by row. Each number is represented by a row in the file that contains 9 integers ni, 1 ≤ i ≤ 9, with its value being (n1 + n2*sqrt(3) + n3*sqrt(7) + n4*sqrt(21)+ n5*α + n6*β + n7*sqrt(7)*α + n8*sqrt(7)*β)/n9, where α = sqrt((7 + 2*sqrt(7))/21) and β = sqrt((7 - 2*sqrt(7))/21).