338230domain: NAppears in sequencesThe number of n-almost primes less than or equal to 6^n, starting with a(0)=1.at n=10A116427Number of (3+1)X(n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, diagonally or antidiagonally, with no adjacent elements equal.at n=8A232518