175021573domain: NPropertiesPrimalityPrimeyesAppears in sequencesTetranacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4) with a(0) = a(1) = a(2) = a(3) = 1.at n=31A000288Primes in the tetranacci sequence A000288.at n=8A247946Prime numbersat n=9767908