# A308863 (b-file synthesized from sequence entry) 0 1 1 1 2 6 3 57 4 736 5 11985 6 235296 7 5403937 8 142073856 9 4206560769 10 138483596800 11 5017244970441 12 198363105460224 13 8498001799768273 14 392127481640165376 15 19388814120804416625 16 1022681739669784231936 17 57317273018414456262273 18 3401527253966521309200384