# A072474 (b-file synthesized from sequence entry) 1 1 2 13 3 77 4 294 5 855 6 2071 7 4403 8 8492 9 15189 10 25585 11 41041 12 63218 13 94107 14 136059 15 191815 16 264536 17 357833 18 475797 19 623029 20 804670 21 1026431 22 1294623 23 1616187 24 1998724 25 2450525 26 2980601 27 3598713 28 4315402 29 5142019 30 6090755 31 7174671