# A153938 (b-file synthesized from sequence entry) 0 1 1 2 2 2 3 3 4 15 5 24 6 95 7 901 8 2926 9 22625 10 415047 11 2632895 12 39794767 13 1442122393 14 17977314936 15 535815289761 16 38169625321927 17 935805308861487 18 54839755115620718 19 7680772354691458379 20 370282826884218784372