830501domain: NAppears in sequencesNumbers n such that 2*p(n)+3, 2*p(n+1)+3, 2*p(n+2)+3, 2*p(n+3)+3 are consecutive primes, where p(i) denotes the i-th prime.at n=12A089009Sum of Fibonacci and tribonacci numbers: a(n) = A000073(n) + A000045(n).at n=25A338192