# A151075 (b-file synthesized from sequence entry) 0 1 1 3 2 10 3 40 4 169 5 729 6 3249 7 14717 8 67436 9 312803 10 1461936 11 6878212 12 32557918 13 154799224 14 739043897 15 3540956927 16 17015609718 17 81988739469 18 395987808269 19 1916493786483 20 9292986559674 21 45136611500778 22 219563958375717 23 1069533315247073 24 5216387240816365 25 25470886932498859 26 124501742320960825