# A172317 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 16 5 32 6 64 7 128 8 255 9 508 10 1012 11 2016 12 4016 13 8000 14 15936 15 31744 16 63233 17 125958 18 250904 19 499792 20 995568 21 1983136 22 3950336 23 7868928 24 15674623 25 31223288 26 62195672 27 123891552 28 246787536 29 491591936 30 979233536