52145

Appears in sequences

• a(n) = (F(2n+1) + F(2n-1) + F(n+3) - 2)/2, where F() = Fibonacci numbers A000045.at n=11A005593
• Shifts 2 places left when binomial transform is applied twice with a(0) = a(1) = 1.at n=10A007472
• a(n) = a(n-1) + a(n-2) + 1, with a(0)=3, a(1)=9.at n=19A022408