# A083580 (b-file synthesized from sequence entry) 0 0 1 1 2 3 3 10 4 34 5 114 6 374 7 1202 8 3798 9 11842 10 36550 11 111954 12 340982 13 1034210 14 3127206 15 9434866 16 28419286 17 85503618 18 257035142 19 772219538 20 2319017910 21 6962034466 22 20896589158 23 62711787570 24 188181500054 25 564640969154