136519

Properties

Appears in sequences

• a(n) = a(n-1) + a(n-2) + 1, with a(0)=3, a(1)=9.at n=21A022408
• Number of rooted unlabeled 4-cactus graphs on 3n+1 nodes.at n=9A287891
• a(n) is the first prime p such that the sum of 2*n consecutive primes starting at p is (q-1)*q where q is prime, or 0 if there is no such p.at n=42A338990
• Prime numbersat n=12716