# A026083 (b-file synthesized from sequence entry) 4 6 5 12 6 38 7 104 8 300 9 856 10 2464 11 7104 12 20550 13 59580 14 173118 15 503960 16 1469546 17 4291644 18 12550290 19 36746592 20 107712306 21 316050372 22 928224594 23 2728494360 24 8026707864 25 23630376000 26 69614498268 27 205212650272 28 605292727450 29 1786351811556