144059domain: NAppears in sequencesNumber of n-step paths that can go {west, southeast, southwest, northwest} on a 240-degree wedge on the equilateral triangular lattice.at n=9A129637Floor( 1/(n*sinh(1/n) + n*sin(1/n) - 2) ).at n=6A248974Semiprimes s such that (3s+1)/2 is semiprime and A001414(s)=2*A001414((3s+1)/2).at n=1A376275