# A083233 (b-file synthesized from sequence entry) 0 1 1 6 2 48 3 384 4 3072 5 24576 6 196608 7 1572864 8 12582912 9 100663296 10 805306368 11 6442450944 12 51539607552 13 412316860416 14 3298534883328 15 26388279066624 16 211106232532992 17 1688849860263936 18 13510798882111488 19 108086391056891904 20 864691128455135232