# A148899 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 8 4 31 5 107 6 407 7 1563 8 6307 9 25314 10 104211 11 434811 12 1834609 13 7775478 14 33349109 15 144050282 16 625106289 17 2726906876 18 11972170104 19 52763988723 20 233310974520 21 1035974027077 22 4617039746546 23 20628654645010 24 92422614238745 25 415320306918677 26 1870678443468084 27 8442702168395044 28 38189122706303356