126491971

Properties

Appears in sequences

• a(n) = 2*Fibonacci(n) - (1 - (-1)^n)/2.at n=39A062114
• a(n) = 2*Fibonacci(2*n+1) - 1.at n=19A069403
• Expansion of (1 - x + 3*x^2 + 4*x^4 + 8*x^5 + 3*x^6 + x^7 + x^8) / ((1 + x)*(1 - x + x^2)*(1 - x - x^2)*(1 + x + 2*x^2 - x^3 + x^4)).at n=38A108391
• Expansion of (1 - x + 3*x^2 + 4*x^4 + 8*x^5 + 3*x^6 + x^7 + x^8) / ((1 + x)*(1 - x + x^2)*(1 - x - x^2)*(1 + x + 2*x^2 - x^3 + x^4)).at n=39A108391
• Prime Leonardo numbers.at n=9A145912
• Smallest prime with n terms in its Zeckendorf representation.at n=18A182667
• a(0)=-1, a(1)=3; a(n+2) = a(n+1) + a(n) + 2*A057078(n+1).at n=39A227104
• a(n) = a(n-1) + a(n-2) + (1 - (-1)^(a(n-1) + a(n-2))) with a(0) = 0, a(1) = 1.at n=38A253197
• Primes which are not the sums of two consecutive non-Fibonacci numbers.at n=22A257110
• Prime numbersat n=7190239