956722026041
domain: N
Appears in sequences
- a(n) = 3*a(n-1) - a(n-2) for n >= 2, with a(0) = a(1) = 1.at n=30A001519
- a(0) = 1, a(1) = 1, and a(n) = 4*a(n-1) + a(n-2) for n >= 2.at n=20A015448
- a(n) = Fibonacci(prime(n)).at n=16A030426
- a(n) = Fibonacci(4*n+3).at n=14A033891
- Fibonacci numbers having initial digit '9'.at n=2A045733
- Pisot sequences L(2,5), E(2,5).at n=28A048575
- Converse numbers: composite Fibonacci numbers Fib(k) that are congruent to Legendre symbol (k/5) mod k.at n=6A048593
- Nonprime Fibonacci numbers with a prime index.at n=6A050937
- Fibonacci numbers which are semiprimes.at n=11A053409
- a(n) is the largest n-digit Fibonacci number.at n=11A072352
- Rearrangement of Fibonacci numbers such that the sum of two consecutive terms + 1 is a prime.at n=26A073580
- Squarefree Fibonacci numbers with an even number of prime factors (mu(n)=1).at n=20A075735
- Fibonacci numbers F(k) as k runs through the products of an odd number of distinct primes A030059 (mu(k)=-1).at n=18A075736
- Smallest Fibonacci number of the form n*k + 1 with k>0.at n=39A076988
- Fibonacci numbers that satisfy: Sum_{k>=1} 1/a(k) = 1, such that the partial sums are nearest to, but never exceed, unity.at n=17A084908
- a(n) = Fibonacci(prime(prime(n))).at n=6A093308
- Smallest m such that 9 is at the n-th position of the decimal representation of the m-th Fibonacci number.at n=11A105719
- Smallest Fibonacci number with Hamming weight n (i.e., smallest number with exactly n ones when written in binary), or -1 if no such number exists.at n=20A114477
- a(n) = A000045(A003622(n)).at n=22A117722
- Dimension of 3-variable non-commutative harmonics (twisted derivative) of order n. The dimension of the space of non-commutative polynomials of degree n in 3 variables which are killed by all symmetric differential operators (where for a monomial w, d_{xi} ( xi w ) = w and d_{xi} ( xj w ) = 0 for i != j).at n=29A122367