102012domain: NAppears in sequencesa(n) = Sum_{k=0..n-1} C(3*k,k)*C(3*n-3*k-2,n-k-1).at n=7A036829Ternary emirpimes.at n=27A119684a(n) = -2*n + 7^n - 5^n.at n=6A121204Digitally balanced numbers: ternary numbers which have the same number of 0's as 1's as 2's.at n=10A181986Number of unimodal functions [1..n]->[0..2].at n=38A223718