180510493

Properties

Appears in sequences

• a(0) = 1, a(1) = 4, and a(n) = a(n-1) + a(n-2) for n >= 2.at n=38A000285
• Expansion of (1+2*x)/(1-3*x+x^2).at n=19A054486
• Primes occurring in the sequence 3, 1, 4, 5, 9, 14, 23, ... (A000285 prefixed with 3).at n=12A091157
• Prime numbersat n=10057140