# A109912 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 16 5 32 6 64 7 128 8 3456 9 127872 10 6649344 11 1010700288 12 46655946694656 13 1313038307827703808 14 946546544999554566644656594944 15 183011223033027037132010301880878170112