# A302837 (b-file synthesized from sequence entry) 0 1 1 0 2 2 3 3 4 16 5 30 6 252 7 399 8 4672 9 8100 10 111200 11 193006 12 3279888 13 5631093 14 114137072 15 196030350 16 4600308224 17 7873377297 18 210745840824 19 359490499457 20 10808589776800 21 18389567969010 22 613522956193532 23 1041400845949218 24 38179982045681856 25 64675343605547500 26 2584515863960831060