# A232618 (b-file synthesized from sequence entry) 1 0 2 2 3 3 4 69 5 60 6 4500 7 104580 8 186795 9 13497435 10 442245825 11 13003053525 12 64585694250 13 3576632909850 14 147580842959550 15 5708173568847750 16 27904470362393625 17 2292043480058957625 18 126842184377462428875 19 6371504674680470700375 20 312265748715684068930625