# A148048 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 10 5 20 6 58 7 139 8 438 9 1140 10 3258 11 9772 12 28562 13 85882 14 251866 15 805191 16 2408942 17 7397564 18 23342986 19 72959148 20 230591190 21 716489490 22 2346086618 23 7379407456 24 23549213138 25 76289251170 26 246337916414 27 799728360510 28 2563657338846 29 8524590676290 30 27557309877842 31 89945529675023 32 296436681030158