# A257517 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 0 4 2 5 2 6 5 7 8 8 18 9 30 10 66 11 120 12 252 13 484 14 1005 15 1984 16 4110 17 8278 18 17150 19 35024 20 72748 21 150012 22 312642 23 649424 24 1358244 25 2837484 26 5954980 27 12497616 28 26313432 29 55434248 30 117062205 31 247412928 32 523881238 33 1110335334 34 2356819254 35 5007428384 36 10652412108 37 22682131308 38 48349084054 39 103150869360 40 220276819836