73845

Appears in sequences

• a(n) = 2*a(n-1) + a(n-2) + n.at n=12A117585
• Let p = n-th prime == 3 mod 8; a(n) = sum of quadratic residues mod p.at n=26A282723
• Solution of the complementary equation a(n) = 3*a(n-1) + b(n-1) - 1, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=10A295134
• Expansion of e.g.f. (1/2)*(x^2*exp(x))*(cosh(x))^2.at n=10A373065