# A275540 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 5 4 27 5 129 6 761 7 5137 8 40695 9 363815 10 3632629 11 39927183 12 479047667 13 6227155921 14 87178936305 15 1307676395009 16 20922800209903 17 355687462555407 18 6402373891522541 19 121645101063561055 20 2432902011892531179