# A124538 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 5 4 11 5 33 6 125 7 551 8 2695 9 14258 10 80343 11 477161 12 2964299 13 19155014 14 128203704 15 885830074 16 6302476880 17 46077527307 18 345590801495 19 2655466079629 20 20880388012659 21 167861200630015 22 1378589193074514 23 11558511053625488