13980895

Appears in sequences

• a(n) = a(n-1) + a(n-2) + a(n-3), a(0)=3, a(1)=1, a(2)=3.at n=27A001644
• a(n) = S(3n), where S(n) is the generalized tribonacci sequence A001644.at n=9A074582
• a(n) = ((1+(-1)^n)*T(n+1) + (1-(-1)^n)*S(n))/2, where T(n) = tribonacci numbers A000073, S(n) = generalized tribonacci numbers A001644.at n=27A075536