# A216281 (b-file synthesized from sequence entry) 1 1 2 2 3 21 4 392 5 11980 6 471966 7 24655820 8 1548264752 9 118039822488 10 10482116888640 11 1076582148812808 12 125439212178037728 13 16473767684928836256 14 2410412979008498588208 15 390793360308270931979400 16 69716064087131957637475968