# A028212 (b-file synthesized from sequence entry) 0 1 1 35 2 775 3 13895 4 220591 5 3239495 6 45114175 7 605081015 8 7896440431 9 100983137255 10 1271943884575 11 15837914099735 12 195494604120271 13 2397051804927815 14 29242027752046975 15 355340314794184055 16 4305125050033912111 17 52039828472216683175 18 627954645427055761375