42615

Appears in sequences

• a(n) = n*(13*n^2 - 7)/6.at n=27A062025
• Triangular array T(n,k), read by rows: coefficients of strong divisibility sequence of polynomials p(1,x) = 1, p(2,x) = 3 + 3*x, p(n,x) = u*p(n-1,x) + v*p(n-2,x) for n >= 3, where u = p(2,x), v = 1 - 2*x - x^2.at n=30A367301
• Expansion of e.g.f. (1 + x)*(1 + x^2/2)*cosh(x).at n=45A388428