# A153948 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 16 4 48 5 338 6 2112 7 27873 8 325940 9 7927215 10 173294023 11 7887044079 12 319688425834 13 27098632121268 14 2049789115719959 15 323784392678130807 16 45665932705751433387 17 13440450508552654148691