# A285737 (b-file synthesized from sequence entry) 0 1 1 1 2 8 3 35 4 107 5 421 6 1312 7 4474 8 13622 9 43977 10 130473 11 388025 12 1146640 13 3265446 14 9352424 15 26033637 16 72144351 17 196664848 18 532768901 19 1422725368 20 3768251677 21 9893857617 22 25709347054 23 66367179293 24 169754459790 25 431237516979 26 1086813719408 27 2722241654623