# A075853 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 3 5 6 6 13 7 27 8 59 9 131 10 295 11 684 12 1609 13 3829 14 9203 15 22262 16 54179 17 132565 18 325823 19 804108 20 1991729 21 4949794 22 12339483 23 30851429 24 77347913 25 194422788 26 489892473 27 1237207811 28 3131186993 29 7940340037 30 20173254851 31 51341234278