# A062258 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 16 5 32 6 64 7 127 8 252 9 500 10 993 11 1972 12 3916 13 7776 14 15441 15 30662 16 60887 17 120906 18 240088 19 476753 20 946709 21 1879921 22 3733040 23 7412858 24 14720031 25 29230199 26 58043664 27 115259801 28 228876346 29 454489608 30 902499570 31 1792132228