75095

Appears in sequences

• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Lucas numbers), t = (primes).at n=25A025098
• Expansion of x*(2-4*x^2-x^3)/((1-x)^2*(1-x-x^2)).at n=23A133931