# A120926 (b-file synthesized from sequence entry) 1 1 2 4 3 16 4 60 5 216 6 756 7 2592 8 8748 9 29160 10 96228 11 314928 12 1023516 13 3306744 14 10628820 15 34012224 16 108413964 17 344373768 18 1090516932 19 3443737680 20 10847773692 21 34093003032 22 106928054964 23 334731302496 24 1046035320300 25 3263630199336 26 10167463313316 27 31632108085872