1113390domain: NAppears in sequencesa(n) = 2*a(n-1) + a(n-2) + a(n-3).at n=16A109545Number of nX3 binary matrices with no initial bit string in any row or column divisible by 6.at n=15A181037a(n) = floor( Product_{k=0..n-1} (k + t) ), where t = Sum_{n>=1} 1/a(n) is given by A293130.at n=8A293131