# A019085 (b-file synthesized from sequence entry) 3 0 4 1 5 4 6 4 7 12 8 21 9 36 10 81 11 215 12 498 13 1230 14 3024 15 7518 16 18716 17 47494 18 119818 19 305638 20 781495 21 2015124 22 5200150 23 13532475 24 35199561 25 92135477 26 241342171 27 634477759 28 1670301161 29 4410053106 30 11656356800 31 30891424869