130021

Properties

Appears in sequences

• Indices of prime Fibonacci numbers.at n=34A001605
• Prime indices of prime Fibonacci numbers.at n=33A083668
• Start with 100016 and repeatedly reverse the digits and add 5 to get the next term.at n=7A119902
• Start with 100013 and repeatedly reverse the digits and add 2 to get the next term.at n=19A120216
• Numbers n such that the n-th Fibonacci number is prime, but cannot be written in the form a^2 + 7*b^2.at n=15A216536
• Numbers n such that the n-th Fibonacci number is prime, but cannot be written in the form a^2 + 3*b^2.at n=15A216553
• Numbers n such that the n-th Fibonacci number is prime and can be written in the form a^2 + 2*b^2.at n=19A216558
• Numbers n such that the n-th Fibonacci number is prime and can be written in the form a^2 + 5*b^2.at n=17A216559
• Numbers n such that the n-th Fibonacci number is prime, but cannot be written in the form a^2 + 6*b^2.at n=23A216570
• Numbers k such that Fibonacci(k) is prime and can be written in the form a^2 + 10*b^2.at n=9A216573
• Prime-indexed primes p such that Fibonacci(p) is prime.at n=7A277284
• Number of 3-regular cubic partitions of n.at n=43A335602
• Primes p such that p, p + 1, p + 2 and p + 3 have 2, 4, 6 and 8 divisors respectively.at n=4A340871
• Numbers k such that d(k) < d(k+1) < d(k+2) < d(k+3) < d(k+4), where d(n) is the number of divisors of n.at n=21A364717
• Prime numbersat n=12161