# A148042 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 8 5 19 6 57 7 165 8 535 9 1700 10 5761 11 19596 12 69357 13 247143 14 904969 15 3344222 16 12578803 17 47771691 18 183784047 19 713153652 20 2795057882 21 11038817438 22 43945343994 23 176118626035 24 710510882943 25 2883088313211 26 11764647473938 27 48250711908615 28 198849105981280 29 823144145532963 30 3421816206647552