# A118929 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 14 5 44 6 152 7 569 8 2270 9 9524 10 41576 11 187432 12 868144 13 4117216 14 19945408 15 98523013 16 495521686 17 2534420852 18 13167361256 19 69417635240 20 370991119792 21 2008036459744 22 10997771773888 23 60896581502800 24 340633178891872