29801577domain: NAppears in sequencesNumber of cubic residues mod 3^n.at n=17A046631a(n) + a(n+1) + a(n+2) = 3^n.at n=17A152733Number of (n+2) X (1+2) 0..2 arrays with each row and column divisible by 13, read as a base-3 number with top and left being the most significant digits.at n=15A263334